VYSIS INC
10-K405, 1998-03-30
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
Previous: BLOWOUT ENTERTAINMENT INC, 10-K, 1998-03-30
Next: CROSS CONTINENT AUTO RETAILERS INC M&L, 10-K, 1998-03-30



<PAGE>

===============================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   FORM 10-K
                            _____________________

               [X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
                                        
                                       OR
                                        
     [  ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934
                                        
                          COMMISSION FILE NO. 0-23659
                                        
                                  VYSIS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                                        
             DELAWARE                                    36-3803405
(STATE OR OTHER JURISDICTION OF            (I.R.S. EMPLOYER IDENTIFICATION NO.)
 INCORPORATION OR ORGANIZATION)  

                                        
           3100 WOODCREEK DRIVE                         60515-5400
       DOWNERS GROVE, ILLINOIS                          (ZIP CODE)
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
                                         
                                         
        REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:  (630) 271-7000
                             _____________________
                                        
       SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:  NONE
                                        
          SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:
                                        
                         COMMON STOCK, $.001 PAR VALUE
                                (TITLE OF CLASS)
                                        
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes         No   X
                                               ------     -----

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.   X   
           -----

     The aggregate market value of voting stock held by non-affiliates of the
registrant as of March 23, 1998 was approximately $33.1 million.

     Number of shares of Common Stock outstanding as of March 23, 1998: 
9,676,258
                             _____________________
                                        
                   DOCUMENTS INCORPORATED BY REFERENCE:  NONE

===============================================================================

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>       <C>                                                             <C>
                                    PART I
ITEM 1:   Business......................................................    3
            General.....................................................    3
            Genomic Disease Management..................................    3
            Technology Platforms........................................    3
            Products....................................................    5
            Food Testing Products.......................................   15
            Sales and Marketing.........................................   15
            Manufacturing...............................................   16
            Collaborations..............................................   16
            Patents, License Rights and Proprietary Information.........   17
            Ability to Practice Technology..............................   18
            Competition.................................................   20
            Government Regulation.......................................   20
            Employees...................................................   21
            Executive Officers..........................................   21
            Scientific Advisory Board...................................   22
ITEM 2:   Properties....................................................   24
ITEM 3:   Legal Proceedings.............................................   24
ITEM 4:   Submission of Matters to a Vote of Security Holders...........   25

                                   PART II

ITEM 5:   Market for the Registrant's Common Equity and Related
          Stockholder Matters...........................................   25
ITEM 6:   Selected Financial Data.......................................   26
ITEM 7:   Management's Discussion and Analysis of Financial Condition
          and Results of Operations.....................................   27
            Overview....................................................   27
            Results of Operations.......................................   27
            Income Taxes................................................   29
            Liquidity and Capital Resources.............................   29
            Recent Accounting Pronouncements............................   30
ITEM 8:   Financial Statements..........................................   30
ITEM 9:   Changes in and Disagreements With Accountants on Accounting
          and Financial Disclosure......................................   30

                                   PART III

ITEM 10:  Directors and Executive Officers of the Registrant............   31
ITEM 11:  Executive Compensation........................................   32
ITEM 12:  Security Ownership of Certain Beneficial Owners and Management   34
ITEM 13:  Certain Relationships and Related Transactions................   35

                                   PART IV

ITEM 14:  Exhibits, Financial Statement Schedules and Reports on 
          Form 8-K......................................................   37

SIGNATURES..............................................................   56
</TABLE>

                                      1
<PAGE>

                 SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

     This Annual Report on Form 10-K contains certain statements which 
describe the Company's beliefs concerning future business conditions and the 
outlook for the Company based on currently available information.  Whenever 
possible, the Company has identified these "forward-looking" statements (as 
defined in Section 21E of the Securities Exchange Act of 1934) by words such 
as "anticipates", believes", estimates", "expects", and similar expressions. 
These forward-looking statements are subject to risks and uncertainties which 
could cause the Company's actual results, performance and achievements to 
differ materially from those expressed in or implied by these statements.  
These risks and uncertainties include, but are not limited to, the following: 
the acceptance of DNA based genetic probes by the medical community, the 
receipt by the Company of necessary regulatory approvals in a timely fashion, 
compliance by the Company with regulatory requirements, dependence by the 
Company on gene discovery and disease correlation efforts of others, the 
acquisition by the Company of rights to develop tests utilizing intellectual 
property of others, uncertainties relating to the development of new 
technologies, dependence on the success of collaborative partners and the 
Company's success in defending its own intellectual property rights and 
avoiding infringing those of others.  Further information concerning factors 
that could significantly impact expected results is included in the following 
sections of this Form 10-K: Business--Ability to Practice Technology; 
Business--Competition; Business--Government Regulation; Legal Proceedings; 
and Management's Discussion and Analysis of Financial Condition and Results 
of Operations.
















                                       2

<PAGE>

                                     PART I

ITEM 1.  BUSINESS

GENERAL

     Vysis, Inc. ("Vysis" or the "Company") is a Genomic Disease Management 
company that develops, commercializes and markets clinical products that 
provide information critical to the evaluation and management of cancer, 
prenatal disorders and other genetic diseases.  Vysis currently markets five 
U.S. Food and Drug Administration ("FDA") cleared clinical products in 
addition to distributing over 240 research products through its direct sales 
operations in the United States and Europe and a worldwide distribution 
network covering 41 countries.  The Company has an installed base of over 440 
proprietary genetic workstations in 20 countries.  The Company's wholly owned 
subsidiary, Gene-Trak Systems Industrial Diagnostics Corporation, 
manufactures and markets food testing kits based on DNA ("Deoxyribonucleic 
Acid") probes.

     The Company was incorporated in Delaware on April 18, 1991. The 
Company's business represents the consolidation of multiple research units 
and programs of Amoco Corporation.  As used herein, "Amoco" refers to Amoco 
Corporation, or its wholly owned subsidiary, Amoco Technology Company 
("ATC"). In 1994, Amoco began consolidation of all of its medical diagnostic 
businesses and related research under the Company. In March 1994, Amoco 
contributed to the Company all of its genetic disease related assets, 
including the stock of Imagenetics Incorporated (an Illinois corporation). 
Also in March 1994, Amoco contributed all of its infectious disease related 
assets and the stock of Gene-Trak, Inc. to the Company. Gene-Trak, Inc. had 
previously acquired certain infectious disease related assets from Genzyme 
Corporation and Amoco, including all of the interest in Gene-Trak Systems, a 
joint venture partnership for infectious disease diagnostics established by 
Amoco and Integrated Genetics in 1986.

     On February 10, 1998, the Company completed the initial public offering 
of 3 million shares of its Common Stock, par value $.001 per share (the 
"Common Stock") at a price of $12.00 per share (the "IPO"). The net proceeds 
of the IPO after deducting expenses were approximately $32.3 million.  
Concurrent with the consummation of the IPO, the Company issued 675,000 
shares of Common Stock at $12.00 per share to Amoco in exchange for a 
reduction of $8.1 million in the Company's note payable to Amoco.  As of 
March 23, 1998, Amoco beneficially owns approximately 69 percent of the 
Company's outstanding Common Stock through ATC.

     The Company's executive offices are located at 3100 Woodcreek Drive, 
Downers Grove, Illinois 60515 and its telephone number is (630) 271-7000. 

GENOMIC DISEASE MANAGEMENT

     Genetic abnormalities are a fundamental source of human disease. Genetic 
based diseases and disorders include cancer, birth defects, mental 
retardation, coronary artery disease, autoimmune diseases and diabetes. 
Genomic Disease Management is an emerging field that seeks to develop new 
genetic tests based on correlations between genetic abnormalities and 
disease. Genomic Disease Management products, by providing new information 
not currently available through existing methods, enable physicians to 
diagnose disease more quickly and accurately, to determine the most 
appropriate treatment and to monitor disease progression and recurrence 
during therapy. Genomic Disease Management products also enable the detection 
of disease at the very early or developing stages when treatment is likely to 
be most effective. In addition, Genomic Disease Management products allow 
physicians to identify genetic predisposition to disease well before the 
disease is manifested, thus enabling early intervention either through 
lifestyle changes or preventive therapy. 

TECHNOLOGY PLATFORMS

     Genomic Disease Management requires the ability to assess abnormalities 
of chromosomes, individual genes within chromosomes and specific DNA 
sequences within genes. No single technology is capable of assessing 

                                       3

<PAGE>

all of these different types of abnormalities. To address this issue, the 
Company has developed three complementary technology platforms that detect 
the full range of genetic abnormalities from large chromosomal aberrations to 
smaller abnormalities associated with abnormal numbers of the same gene and 
the smallest mutations within specific gene sequences. The Company believes 
these complementary technologies will enable the clinician to provide a 
comprehensive approach to genomic assessment in the management of disease. 

     Vysis' three technology platforms include: the FISH ("FLUORESCENT IN 
SITU HYBRIDIZATION") System, which detects chromosomal copy number and 
rearrangement (large genetic structures), the gCGH-TM- ARRAY SYSTEM, which 
detects gene copy number and expression (smaller genetic structures), and the 
Molecular Lawn-TM- System, which detects specific gene sequences and their 
mutations (smallest genetic structures). Each platform provides the advantage 
of being able to simultaneously detect multiple genetic abnormalities in the 
same specimen. Vysis expects to introduce a broad range of products based on 
each of these platforms. Each of these three technology platforms also relies 
upon the Company's image analysis software, which is comprised of proprietary 
algorithms that enable the automated display and analysis of FISH, gCGH Array 
and Molecular Lawn tests. 

FISH SYSTEM

     The FISH System provides the ability to simultaneously assess multiple 
chromosomal and gene abnormalities in a single intact cell. FISH also 
provides the ability to perform cell by cell quantitative assessment of 
genetic changes in tissue specimens routinely used by pathologists for 
diagnosis.  FISH is useful primarily to detect gross or large chromosomal 
changes, such as extra chromosomes, missing chromosomes, chromosomal 
translocations, and gene amplifications and deletions.  The Company's FISH 
System consists of instruments and image analysis workstations used with the 
Company's patented direct label FISH DNA probes. 

     Vysis has developed and is continuing to refine instruments and image 
analysis workstations used in conjunction with the Company's direct label 
FISH probes. The Company's HYBrite-TM- instrument automates 
the hybridization process in a temperature controlled environment. The 
Company's Quips Genetic Workstations provide integrated solutions to enhance 
and automate the visualization, analysis, and storage of FISH images. The 
Company is currently undertaking development of a high throughput instrument 
that will automate both specimen preparation and the hybridization process.

gCGH-TM- ARRAY SYSTEM

     The gCGH Array System uses the Company's patented comparative genomic 
hybridization ("CGH") technology to survey the entire genome for chromosomal 
changes in a single test. The fundamental principle of CGH is to compare an 
abnormal or test DNA or RNA ("Ribonucleic Acid") specimen to a reference DNA 
or RNA in order to detect genetic aberrations. This method, like the FISH 
System, does not require culturing of "metaphase cells" for a metaphase 
spread preparation from the sample. For this reason, CGH enables genetic 
testing of tissues that are not amenable to culture such as tumor tissues. In 
contrast to traditional FISH technology that typically involves use of a 
specific probe to a known chromosomal abnormality, CGH can be used to 
investigate an entire genome even when a suspected genetic aberration is 
unknown.

     Vysis is developing a ready-to-use array of DNA probes on a miniaturized 
chip ("gCGH array") which incorporates its patented CGH technology. Each 
element of the array will contain DNA from a defined location on a normal 
human chromosome and, in total, the collection of elements may represent the 
entire genome. This system is intended to enable simultaneous assessment of a 
large number of genes in a patient's specimen for abnormalities in the 
specific gene count. The gCGH Array System, consisting of individual arrays, 
a high speed camera based reader and specimen processing reagents is 
currently at the prototype stage of development. The Company currently has 
the capability of manufacturing research quantities of gCGH Arrays and is 
developing a high throughput robotic system for production of commercial 
quantities of arrays. 

                                       4

<PAGE>

Molecular Lawn System

     The Molecular Lawn System uses the Company's patented Q-beta replicase 
("QBR") amplification technology to detect specific gene sequences. QBR 
provides a quantitative measure of a specific gene sequence in either human, 
viral or bacterial DNA. A Molecular Lawn consists of individual or multiple 
probe sequences attached to the surface of a miniaturized solid support, 
similar to the blades of grass on a lawn.  Because the Molecular Lawn is a 
self contained system and is being specifically designed for clinical use, 
this QBR based product is intended to provide a more accurate, simple and 
cost-effective alternative to other amplification technologies such as 
polymerase chain reaction ("PCR"). This technology platform enables the 
detection of small genetic targets associated with disease predisposition and 
early detection of disease. The system includes a disposable test device and 
an automated reader that will provide both qualitative and quantitative 
results. The Company's initial product will be designed for the detection of 
Human Papilloma Virus ("HPV"), which causes cervical cancer. 
     
PRODUCTS

CLINICAL DIAGNOSTIC PRODUCTS

     Vysis is developing, commercializing and marketing clinical products 
that provide information critical to the evaluation and management of cancer, 
prenatal disorders and other genetic diseases.  The Company's 
AneuVysion-TM- Assay Panel for the detection of Down 
Syndrome and other prenatal birth defects, which had been approved by the FDA 
in October 1997, received regulatory approval for marketing in France from 
the French Agence du Medicament (ADM) in March 1998. The Company's clinical 
diagnostic product commercialization process involves four distinct stages 
prior to marketing which include, in order, research, development, clinical 
trials and regulatory review. 

                                       5

<PAGE>

                                 CLINICAL PRODUCTS


<TABLE>
<CAPTION>
PRODUCT                         TECHNOLOGY PLATFORM      DISEASE/PROCEDURE        INTENDED UTILITY            STAGE
- -------                         -------------------      ------------------       ----------------            ------
<S>                             <C>                      <C>                      <C>                         <C>
CANCER
CEP-Registered Trademark- 8     FISH System              Chronic                  Disease monitoring          MARKETING
                                                         Myelogenous                                          (FDA 510(k)
                                                         Leukemia, myeloid                                    cleared November
                                                         disorders                                            1996)

CEP-Registered Trademark- 12    FISH System              Chronic                  Disease progression and     MARKETING
                                                         Lymphocytic              disease monitoring          (FDA 510(k)
                                                         Leukemia                                             cleared January
                                                                                                              1997)

CEP-Registered Trademark- X/Y   FISH System              Bone marrow              Disease monitoring          MARKETING
                                                         transplantation                                      (FDA 510(k)
                                                                                                              cleared January
                                                                                                              1997)

HER-2/neu                       FISH System              Breast cancer            Selection of therapy and    CLINICAL
                                                                                  prognosis                   TRIALS

bcr/abl ES                      FISH System              Chronic                  Diagnosis and disease       DEVELOPMENT
                                                         Myelogenous              monitoring
                                                         Leukemia

Breast Panel                    gCGH Array System        Breast cancer            Selection of therapy and    RESEARCH
                                                                                  prognosis

Bladder Panel                   FISH System              Bladder cancer           Disease recurrence          RESEARCH
                                                                                  monitoring

Prostate Panel                  gCGH Array System        Prostate cancer          Disease progression         RESEARCH

Human Papilloma                 Molecular Lawn System    Cervical cancer          Early disease detection     RESEARCH
  Virus Panel
</TABLE>









                                       6

<PAGE>

<TABLE>
<CAPTION>
PRODUCT                         TECHNOLOGY PLATFORM      DISEASE/PROCEDURE        INTENDED UTILITY            STAGE
- -------                         -------------------      ------------------       ----------------            ------
<S>                             <C>                      <C>                      <C>                         <C>
TriGen-TM-                      FISH System              Down syndrome,           Detection of mental         MARKETING
  Panel                                                  sex chromosome           retardation and other       (ADM registered in
                                                         disorders                birth defects               June 1997)

AneuVysion-TM-                  FISH System              Down syndrome,           Detection of mental         MARKETING
                                                         and other                retardation and other       (FDA 510(k)
                                                         chromosomal              birth defects               cleared October
                                                         disorders                                            1997; ADM
                                                                                                              registered in March
                                                                                                              1998)

Aneu-Del-Tel-TM-                gCGH Array System        Down syndrome,           Detection of essentially    RESEARCH
  Chip                          and other                all chromosomal          abnormalities causing
                                                         chromosomal              common mental
                                                         disorders                retardation and other
                                                                                  birth defects
                                                                                  

Fetal Screen                    FISH System              Down syndrome,           Detection of mental         RESEARCH
                                                         and other                retardation and other
                                                         chromosomal              birth defects from fetal
                                                         disorders                cells in maternal blood
                                                                                  circulation
</TABLE>


CANCER PRODUCTS

     The Company is currently focusing its cancer product development efforts 
on leukemia, breast, bladder, prostate and cervical cancers. The American 
Cancer Society estimates that approximately 1.4 million people in the United 
States were diagnosed with some form of cancer in 1997. Approximately 27,600 
patients developed some form of leukemia in 1996. Breast cancer is the second 
leading cause of death from cancer among women aged 35 to 54, and prostate 
cancer is the second leading cause of death from cancer in men. The American 
Cancer Society estimates that in 1996 there were approximately 52,900 new 
cases of bladder cancer. Approximately 62 million Papanicolaou ("PAP") tests 
are performed annually in the United States to screen for cervical cancer. 

     LEUKEMIA.  The Company's first clinical product, CEP 8 Probe Kit, which 
is based on the FISH System, was cleared by the FDA in November 1996 by a 
510(k) premarket notification. The CEP 8 Probe Kit is used for the detection 
of the abnormal occurrence of three copies of chromosome 8. Used in 
conjunction with other tests, this product is used to monitor disease 
activity during treatment to assess therapeutic effectiveness and during 
remission for disease recurrence. This information provides the physician 
with an indication of early blast crisis which is important when considering 
bone marrow transplantation therapy. 

     The Company's second clinical product, CEP 12 Probe Kit, which is based 
on the FISH System, was cleared by the FDA in January 1997 by a 510(k) 
premarket notification. The CEP 12 Probe Kit is used for the detection of the 
abnormal occurrence of three copies (trisomy) of chromosome 12, one of the 
more common genetic abnormalities in chronic lymphocytic leukemia ("CLL"). 
The incidence of CLL in the United States is approximately 7,200 new cases 
per year with about 60,000 individuals currently afflicted with this disease. 
These patients have a widely variable clinical course and many do not require 
therapy at the time of diagnosis. The detection of trisomy 12 provides the 
physician the ability to distinguish patients whose disease will rapidly 
progress. These patients may require immediate treatment while others may be 
monitored for disease progression without therapeutic intervention. 

                                       7

<PAGE>

     The Company's third clinical product, CEP X/Y Probe Kit, which is based 
on the FISH System, was cleared by the FDA in January 1997 by a 510(k) 
premarket notification. The CEP X/Y Probe Kit is used to assess how well 
donor cells are accepted by the recipient in sex-mismatched bone marrow 
transplantation and to determine the recurrence of malignant cells. In the 
management of many leukemias and other myeloid disorders, bone marrow 
transplantation is a critical therapeutic strategy. Approximately 4,200 
sex-mismatched transplantations were performed in the United States in 1996. 
Having an estimate of the proportions of donor and recipient cells following 
a transplantation can be useful in assessing the success of the procedure and 
to diagnose recurrence. The improved sensitivity and precision of the CEP X/Y 
product, as compared to standard cytogenetic analysis, permits a more 
reliable detection of therapeutic efficacy or failure at a stage when 
modification of therapy will still be possible. 

     A fourth product, a bcr/abl translocation probe currently under 
development, is expected to be submitted for regulatory review in the United 
States and Europe. The bcr/abl ES product, which is based on the FISH System, 
is intended to be used to confirm the diagnosis of CML and to monitor the 
presence of residual disease. 

     BREAST CANCER.  The Company has completed clinical trials and is 
currently preparing a submission to the FDA for its first breast cancer 
product, HER-2/neu. Results from the HER-2/neu test are intended to rapidly 
assess the amplification of HER-2/neu gene for use as a predictive marker for 
response to chemotherapy and/or hormone therapy. Results will also be used as 
a prognostic marker for risk assessment. 

     The Company's HER-2/neu product, which is based on the FISH System, is a 
locus specific, direct label DNA probe for the HER-2/neu gene. This assay is 
designed for the detection and quantification of the HER-2/neu gene and 
chromosome 17 in cells. Occasionally, extra copies of the chromosome 17 will 
result in a false positive HER-2/neu result. The Company's product includes a 
second DNA probe specific for chromosome 17, which is intended to serve as a 
built in control for false positive results due to extra copies of chromosome 
17.  The Company, in collaboration with independent laboratories, conducted 
performance studies of the Company's HER-2/neu gene product which indicate 
that the product may be able to detect HER-2/neu amplification in 50 percent 
more women with breast cancer than detected by antibody based 
immunohistochemistry in standard paraffin tissue sections. 

     Because cancer is considered a multi-gene event, the Company believes 
that appropriate patient management may require simultaneous testing for 
multiple genetic abnormalities, such as amplification of the c-myc gene, the 
Cyclin D1 gene and the q13.2 region on chromosome 20 in addition to 
HER-2/neu. The Company is developing products based on the Company's gCGH 
Array System which are intended to provide the ability to simultaneously 
detect both gene amplification abnormalities and gene deletion abnormalities, 
such as deletion of the p53 tumor suppressor gene. 

     BLADDER CANCER.  The Company is developing a highly sensitive product 
based on the FISH System technology platform intended to provide simultaneous 
analysis of multiple genetic markers for bladder cancer from a routine urine 
specimen. A number of published studies have demonstrated that these genetic 
markers are correlated to bladder cancer. 

     PROSTATE CANCER.  The Company believes that information regarding the 
genetic composition of prostate cancer tumors could distinguish between men 
who should be monitored without surgical intervention and those whose 
prostates should be removed. The Company is developing a product that 
includes a panel of genetic markers designed to provide information 
indicating which patients should receive more aggressive therapeutic 
intervention. Because prostate cancer is also considered a multi-gene event, 
the Company believes that appropriate patient management will require 
simultaneous testing for multiple genetic abnormalities. Products based on 
the Company's gCGH Array System are intended to provide the ability to 
simultaneously detect both gene amplification abnormalities and gene deletion 
abnormalities, each of which have been associated with disease progression. 
In conjunction with the Mayo Clinic, the Company is evaluating several 
potential leads for its initial gCGH Array product panel. 

                                       8

<PAGE>

     CERVICAL CANCER.  Vysis is developing a product for the simultaneous 
detection of specific high and low risk types of HPV based on the Company's 
Molecular Lawn System technology platform. The initial product application 
will be to test patient specimens classified as atypical with PAP testing. 
The Company expects that this product would be introduced as a patient 
screening test performed in conjunction with a PAP test. The Company believes 
this product will be easier to use and more cost effective than currently 
available technologies. 

     Additionally, the Company believes that assessing changes in the genetic 
composition of cervical cells will also be important for the early 
identification of cells in a pre-cancerous state. Combined with HPV testing, 
genetic screening has a high potential for accurately predicting malignant 
transformation not currently possible. The Company is assessing potential 
genetic targets to be combined with its HPV tests. 

PRENATAL PRODUCTS

     The Company's prenatal testing products provide information on genetic 
abnormalities involved in mental retardation and other birth defects. The 
Company estimates that in the United States and Western Europe more than 
600,000 amniocentesis procedures were performed in 1996.

     AMNIOCENTESIS TESTING.  Amniocentesis is an invasive procedure required 
to obtain the fetal cells for diagnosis of chromosomal abnormalities. In 
amniocentesis, amniotic fluid containing fetal cells is removed from the 
uterus with an ultrasound-guided needle passed through the abdominal wall. 
Traditional testing of the fetal cells is accomplished by direct 
visualization of stained chromosomes. This analysis, which is known as 
karyotyping, is a standard cytogenetic method which requires 7 to 10 days for 
completion at an estimated patient cost of $400 to $800 per analysis.

     The Company's first prenatal diagnostic product, based on the FISH 
System, is the TriGen Assay for the direct diagnosis of Down syndrome (three 
copies of chromosome 21) and sex chromosome abnormalities (aneuploidies of 
chromosomes X and Y). The product is designed to diagnose these abnormalities 
on a single slide within 24 hours from cells obtained by amniocentesis. 
Clinical trials conducted by the Company at 18 laboratories involving 558 
patients demonstrated 100 percent correlation of TriGen results to standard 
karyotyping results. The French regulatory agency, Agence du Medicament 
("ADM"), registered the product in May 1997, as a stand alone diagnostic 
test. 

     The Company's AneuVysion-TM- product is a FISH System for the direct 
diagnosis of Down syndrome, sex chromosome abnormalities and two additional 
chromosomal abnormalities. The Company's submission on its AneuVysion 
prenatal product was cleared by the FDA as a 510(k) in October 1997 and 
approved by the French ADM in March 1998. Clinical trials conducted by the 
Company at 31 laboratories involving 1,516 patients demonstrated 99.9 percent 
correlation of AneuVysion results to standard karyotyping for those 
chromosomal abnormalities that represent 85 percent to 90 percent of the 
chromosomal abnormalities associated with mental retardation and other birth 
defects. In the United States, the AneuVysion product is cleared as an 
adjunct to standard cytogenetic testing of amniocentesis specimens and in 
Europe is registered as a stand alone diagnostic test. 

     The Company is developing a gCGH Array prenatal product that is intended 
to simultaneously detect multiple chromosome aneusomies, microdeletions and 
unbalanced chromosome translocations. These abnormalities may account for 
essentially all of the causes of common mental retardation and other birth 
defects detectable with conventional amniocentesis and karyotyping. 

     MATERNAL BLOOD TESTING.  Due to the invasive nature of the amniocentesis 
procedure, current prenatal genetic testing is indicated only in high risk 
pregnancies. Although the risk of having a child with Down syndrome increases 
with maternal age, most pregnancies occur in younger women and, hence, most 
births of children with Down syndrome occur to younger women for whom 
amniocentesis is not indicated. The ability to detect and analyze fetal cells 
in maternal blood would permit women to be routinely screened for genetic 
abnormalities associated with mental retardation and birth defects by direct 
genetic analysis of fetal cells. 

                                       9

<PAGE>

     Maternal blood has been shown to contain cells derived from the fetus, 
although these cells are exceedingly rare. The feasibility of genetic 
analysis of fetal cells isolated from maternal blood has been demonstrated, 
but obtaining a sufficient number of fetal blood cells for analysis has been 
difficult and generally not suitable to routine clinical application. Vysis 
is currently researching a system to identify fetal cells in maternal blood 
specimens and detect chromosomal abnormalities in those cells. Such a system 
is expected to include reagents to identify fetal cells, the Company's 
currently developed FISH probe products (for chromosomes 13, 18, 21, X and Y) 
and a rapid imaging system. 

RESEARCH PRODUCTS

     Vysis currently markets over 240 research use only ("RUO") DNA probes 
and related reagent products. The Company's principal customers are genetics 
testing laboratories and research centers around the world. The Company 
introduced 41 new RUO products in 1997.  The research reagent product line 
represented approximately $4.6 million of the Company's $16.0 million of 
product revenues in 1997, approximately $2.8 million of the Company's $11.0 
million of product revenues in 1996 and approximately $1.5 million of the 
Company's $6.3 million of product revenues in 1995.

     The Company's research product commercialization process involves three
distinct stages prior to marketing which include, in order, research,
development and trials. 





















                                       10

<PAGE>

                                 RESEARCH PRODUCTS


<TABLE>
<CAPTION>
PRODUCT                  TECHNOLOGY PLATFORM           DISEASE/PROCEDURE              POSSIBLE UTILITY                 STAGE
- -------                  -------------------           ------------------             ----------------                 -----
<S>                      <C>                           <C>                            <C>                              <C>
WCP-Registered           FISH system                   Prenatal, postnatal            Analysis of metaphase            MARKETING
  Trademark- Probes                                    and cancer                     chromosomes, additions,
  (103 products)                                                                      deletions and
                                                                                      translocations

CEP-Registered           FISH System                   Prenatal, postnatal            Determination of                 MARKETING
  Trademark- Probes                                    and cancer                     chromosome copy
  (45 products)                                                                       number

LSI-Registered           FISH System                   Prenatal, postnatal            Determination of gene            MARKETING
  Trademark- Probes                                    and cancer                     copy number,
  (41 products)                                                                       chromosomal
                                                                                      translocations, and
                                                                                      presence of
                                                                                      microdeletions

CGH Probes and           FISH System                   Prenatal, postnatal            Determination of                 MARKETING
  solutions                                            and cancer                     chromosome region of
  (10 products)                                                                       amplification and
                                                                                      deletion

MultiVysion-TM-          FISH System                   Preimplantation                Improved success rate of         MARKETING
  PGT                                                  genetic testing                IN VITRO fertilization
                                                                                      implantation and
                                                                                      successful birth

Telomere Probes          FISH System                   Mental retardation             Detects hidden                   MARKETING
                                                       analysis                       chromosomal deletions
                                                                                      and/or translocations not
                                                                                      possible with traditional
                                                                                      karyotyping

Spectral                 FISH System                   Cancer and prenatal            Detects hidden                   DEVELOPMENT
  Karyotyping                                          karyotyping analysis           chromosomal
  Reagent                                              in 24 colors                   rearrangements not
                                                                                      possible with traditional
                                                                                      karyotyping

Ampli-Onc-TM-            gCGH Array System             All cancers                    Detects substantially all        RESEARCH
  Chip                                                                                genes amplified in cancer

Onc-Express-TM-         gCGH Array System             All cancers                     Detects genes expressed          RESEARCH
  Chip                                                                                in cancer

</TABLE>


     The Company markets three FISH probe product lines, respectively 
marketed as WCP-Registered Trademark-, CEP-Registered Trademark- and 
LSI-Registered Trademark- probes and various reagents. These products are 
used in a wide range of genetic research.

                                       11

<PAGE>

     WCP WHOLE CHROMOSOME PAINT FISH PROBES.  WCP probes fluorescently label 
or "paint" the unique sequences of an entire chromosome allowing analysis of 
the chromosome number as well as indicating chromosome additions and simple 
and complex translocations in human metaphase cells. 

     CEP CHROMOSOME ENUMERATION FISH PROBES.  CEP probes hybridize to repeat 
sequence targets on specific chromosomes. This allows for rapid counting of 
chromosomes to determine if there are too few or too many chromosomes within 
interphase or metaphase cells. 

     LSI LOCUS SPECIFIC IDENTIFIER FISH PROBES.  LSI probes hybridize to 
specific locations on individual chromosomes and identify specific sequences 
of DNA, which are typically gene or disease specific. By highlighting 
specific regions of the chromosome, these probes quickly identify if specific 
genes are present as expected or whether certain gross chromosomal changes 
exist. 

     COMPARATIVE GENOMIC HYBRIDIZATION (CGH) REAGENTS.  CGH reagents are a 
line of products for performing comparative genomic hybridization, a tool for 
determining previously unidentified gene amplifications and deletions in 
genetic diseases and cancers. 

     PREIMPLANTATION GENETIC TESTING ("PGT").     The Company in late 1997 
introduced its first PGT product, MultiVysion PGT, based on the FISH System, 
which simultaneously detects abnormalities of chromosomes 13, 18, 21, X and Y 
in a single cell within 4 hours. The Company believes that completing a PGT 
analysis using Vysis' patented multi-color probes will increase the 
probability of a successful implantation and birth at a substantially lower 
cost for patients undergoing IN VITRO fertilization. 

     TELOMERE PROBES.  Telomeres are unique sequences of DNA at the end of 
chromosomes that contain a large number of genes. Telomeres play an integral 
role in chromosome biology, structure, and function. Changes in telomeres, 
such as deletions or translocations frequently missed by traditional 
karyotyping, have been implicated as causes of mental retardation and cancer. 
There are approximately 60,000 peripheral blood lymphocyte specimens tested 
each year to evaluate patients for chromosomal causes of mental retardation. 
The Company is developing a line of individual locus specific FISH probes and 
a multi-color telomere panel for research in chromosomal causes of mental 
retardation and cancer. 

     SPECTRAL KARYOTYPING REAGENT.  Traditional karyotypes employ black and 
white images of chromosomes and interpretation of these karyotypes requires 
sophisticated training in recognition of chromosome patterns and changes in 
the chromosomes.  Frequently subtle translocations are missed utilizing 
traditional black and white karyotyping. The Company's Spectral Karyotyping 
Reagent is intended to simplify and improve the accuracy of karyotyping by 
providing a unique color to each chromosome, thus allowing the detection of 
chromosomal rearrangements not possible with traditional karyotyping. The 
Company is developing a spectral karyotyping system comprised of a 24 color 
probe reagent set and a genetic workstation that incorporates proprietary 
software for image analysis of the multi-color karyotype provided by the 
reagent. 

     AMPLI-ONC AND ONC-EXPRESS CHIPS.  The Company is developing an Ampli-Onc 
Chip based on its gCGH Array System that will detect substantially all 
currently known genes amplified in cancer. This ready-to-use array of DNA 
probes on a miniaturized chip is intended to enable simultaneous assessment 
of a large number of genes in patient specimens for abnormalities in specific 
gene counts. The Company is also developing Onc-Express Chip, an array of DNA 
probes for the simultaneous assessment of a large number of expressed genes 
in patient specimens. The Company believes that simultaneous testing for 
multiple genetic abnormalities is likely to accelerate research and provide 
clinical correlations between chromosomal abnormalities and disease. Both of 
these products may enable researchers to discover new correlations that may 
yield genomic products for improved diagnosis, prognosis and predictive 
outcome. 

INSTRUMENT PRODUCTS

     Vysis currently markets a line of instrument products which includes 
genetic imaging workstations and other processing instruments. Because 
instrument products are developed for use in connection with both clinical 

                                       12

<PAGE>

and research products, the commercialization process for instrument products 
mirrors the previously described commercialization process for clinical or 
research reagent products. These workstations provide an integrated solution 
to enhance and automate the visualization, analysis, and storage of FISH, 
mFISH (simultaneous imaging of multiple FISH probes), CGH, and karyotype 
images. These workstations integrate proprietary software, and readily 
available hardware, such as high-resolution cameras, microscopes and desktop 
computer systems. The Company's principal customers for these workstations 
are genetic testing laboratories and research centers around the world. The 
Company has an installed base of over 440 proprietary genetic workstations in 
20 countries. The Company introduced three new instrument products in 1997.  
The instrument product line represented approximately $7.0 million of the 
Company's $16.0 million of product revenues in 1997, approximately $4.3 
million of the Company's $11.0 million of product revenues in 1996 and 
approximately $2.2 million of the Company's $6.3 million of product revenues 
in 1995.










                                       13

<PAGE>


                                  INSTRUMENT PRODUCTS

<TABLE>
<CAPTION>
PRODUCT                  TECHNOLOGY PLATFORM           DISEASE/PROCEDURE              UTILITY                          STAGE
- -------                  -------------------           -----------------              -------                          ------
<S>                      <C>                           <C>                            <C>                              <C>
Karyotyping              Image Analysis Software       Cancer and                     Clinical and research            MARKETING
  Software                                             prenatal testing               automated classification of      (FDA 510(k)
                                                                                      chromosomes                      cleared
                                                                                                                       February
                                                                                                                       1990)

FISH Software            FISH System                   Cancer and                     Clinical and research            MARKETING
                                                       prenatal testing               imaging of FISH probes

CGH Software             FISH System                   All cancers                    Research for chromosomal         MARKETING
                                                                                      amplifications and
                                                                                      deletions

Lab Manager-TM-         Database Software             Cancer and                      Patient data management          MARKETING
  Software                                            prenatal testing                incorporated in
                                                                                      karyotyping, CGH and
                                                                                      FISH software

HYBrite-TM-             FISH System                   Cancer and                      Clinical and research            MARKETING
  System                                              prenatal testing                semi-automated
                                                                                      hybridization of FISH
                                                                                      probes

Quips mFISH              FISH System                   Cancer and                     Clinical and research            MARKETING
  Software                                             prenatal testing               simultaneous imaging of
                                                                                      multiple FISH probes

gCGH Array               gCGH Array System             Cancer and                     Reads gCGH Arrays                DEVELOPMENT
  Reader                                               prenatal testing

Spectral                 FISH System                   Cancer and                     Clinical and research            DEVELOPMENT
  Karyotyping                                          prenatal testing               automated classification
  Software                                                                            and imaging of
                                                                                      chromosomes in 24-colors

Automated                FISH System, gCGH             Cancer, prenatal               Automates steps of FISH,         RESEARCH
  Specimen               Arrays System,                and viral testing              gCGH Array and Molecular
  Processor and          Molecular Lawn System                                        Lawn assays
  Test Instrument

Molecular Lawn           Molecular Lawn System         Cancer, prenatal               Reads Molecular Lawn             RESEARCH
  Reader                                               and viral testing              tests
</TABLE>

     QUIPS-TM- GENETIC WORKSTATIONS AND IMAGING SOFTWARE.  Genetic 
workstations consist of computer hardware, imaging cameras, microscopes 
purchased from third party vendors and proprietary software designed to 
capture, analyze, document and store data required for cytogenetic analyses. 
The genetic workstation product line includes various combinations of 
hardware and software for karyotyping, FISH, mFISH (multi-target FISH) and 
CGH. 

                                       14

<PAGE>

     Hybrite-TM-.  HYBrite is a semi-automated instrument for denaturation 
and hybridization of FISH probes. The HYBrite system eliminates the need for 
denaturation reagents and other temperature devices. The HYBrite shortens 
assay time, eliminates steps and reduces user variability. 

FOOD TESTING PRODUCTS

     The Company develops, manufactures and commercializes products for the 
detection and identification of food-borne pathogens to food processors and 
quality control laboratories. These products, marketed under the 
Gene-Trak-Registered Trademark- name, include both DNA probe products and 
antibody kits for the detection of organisms found to contaminate food such 
as Salmonella, E. coli, Listeria and Listeria monocytogenes. The Company's 
food testing product revenues were approximately $2.5 million in 1997, 1996 
and 1995, respectively. 

SALES AND MARKETING

MARKETS AND CUSTOMERS

     There are approximately 350 cytogenetics laboratories in the United 
States that include hospital- based laboratories and non-hospital-based 
reference laboratories. In addition, there are approximately 5,200 
hospital-based pathology laboratories and approximately 200 cancer research 
laboratories in the United States. The combination of these laboratories 
creates more than 5,750 potential customers for the Company's products in the 
United States alone. The Company estimates the international market for its 
products to be approximately two times the size of the United States market. 

MARKETING STRATEGY

     The Company currently markets its products to cytogenetic laboratories, 
hospitals, reference laboratories, academic and commercial research 
institutions and managed care organizations. Vysis expects that the principal 
customers for its clinical diagnostic products will include cytogeneticists, 
pathologists, oncologists and other physicians. In order to accelerate 
clinical market acceptance of its Genomic Disease Management products, the 
Company is developing programs designed to (i) increase the level of 
awareness of FISH System products among the clinical laboratories and the 
physicians who are expected to order these tests, (ii) educate the medical 
community regarding the benefits of managing disease with genomic testing 
products, and (iii) provide data demonstrating clinical correlation of the 
disease target to disease outcome, progression and predisposition. The 
Company will pursue these programs through the use of collaborations with 
external laboratories and scientists who are influential opinion leaders, the 
use of third-party published articles and the publication of data obtained in 
product clinical trials. 

SALES STRATEGY

     Sales in the United States are conducted by a direct sales force, 
currently consisting of a national sales manager and nine technical sales 
representatives. Five representatives are dedicated to clinical and research 
reagent sales. The remaining four representatives are dedicated to sales of 
genetic workstations. European sales are managed by country specific managers 
supported by a ten person direct sales organization for Germany, France and 
the United Kingdom.

     Sales and marketing in Japan is conducted through a marketing 
partnership with Fujisawa Pharmaceutical Co., Ltd. ("Fujisawa"). The 
partnership, entered into in July 1995, provides Fujisawa with a ten-year 
exclusive distribution right to market Vysis FISH probes and genetic 
workstations in Japan. Fujisawa is responsible for funding all clinical 
regulatory compliance for the Japanese market. Vysis will supply all of its 
United States and European clinical trial data for its FISH products to 
assist Fujisawa in its regulatory approval efforts. The agreement provides 
that Fujisawa will pay the Company $600,000 per year through July 1999. 
Fujisawa introduced the Company's clinical research reagent product line in 
December 1995 and released the Company's genetic workstations in 1996. 

                                       15

<PAGE>

     Sales in the other world markets are conducted through the use of local 
distributors. These distributors are supported through the Company's United 
States and European offices.  See Note 10 of Notes to Consolidated Financial 
Statements for financial information of the Company organized by geographic 
area and export sales.

MANUFACTURING

     The Company's manufacturing operations encompass the production and 
packaging of DNA probes and reagents, as well as the integration of the 
Company's imaging software with off-the-shelf electronic cameras, computer 
systems and other computer peripheral equipment. The Company's manufacturing 
operations utilize a complete material requirements planning system fully 
integrated with the Company's finance department for operational control. The 
Company believes that current manufacturing processes are readily scaleable 
to meet expected growth. 

     The reagent and instrument manufacturing processes are performed 
according to the FDA's Quality System Regulation ("QSR"), which replaced the 
FDA's Good Manufacturing Practices ("GMP") criteria. The Company trains 
employees for compliance with current QSR requirements as specified by the 
FDA. See "Business-Government Regulation." The Company is ISO 9001 certified. 
ISO 9001 is the most comprehensive of all the International Organization for 
Standardization quality standards and is an important element of the 
Company's strategy to commercialize its products globally. 

COLLABORATIONS

     The Company has established a series of collaborations designed to 
accelerate gene discovery efforts and correlation studies to link genetic 
abnormalities to disease outcomes, from which it will obtain diagnostic and 
therapeutic rights.  In addition, the Company has collaborations for the 
further development of its technology platforms. 

UNIVERSITY OF CALIFORNIA, SAN FRANCISCO

     The Company funds research at the Department of Laboratory Medicine, 
University of California, San Francisco ("UCSF") Cancer Center at the UCSF 
Medical School, directed by Dr. Joe Gray, which examines correlations of 
chromosome abnormalities to disease and  discovery of genes related to 
regions of abnormalities identified by CGH.

THE MAYO CLINIC

     The Company funds research by Dr. Robert Jenkins at the Mayo Clinic's 
Department of Cytology in the area of correlation of chromosomal 
abnormalities to aggressive forms of prostate cancer and genes associated 
with metastatic potential.

DIGITAL SCIENTIFIC

     In January 1996, the Company and Digital Scientific Ltd. ("Digital") 
entered into an exclusive marketing and software co-development agreement to 
market Digital's SmartCapture-TM- FISH imaging software under which the 
Company also acquired a worldwide exclusive license to market all of 
Digital's imaging software products. In addition, the Company and Digital 
agreed to co-develop imaging software to be marketed by the Company as part 
of its Quips Genetic Workstations.

                                       16

<PAGE>

PUBLIC HEALTH RESEARCH INSTITUTE OF NEW YORK

     The Company funds a research and development collaboration and supports 
broad based QBR research activities in the laboratory of Dr. Fred Kramer at 
the Public Health Research Institute ("PHRI") of New York in New York City.

INCYTE PHARMACEUTICALS

     In July 1996, the Company entered into a collaboration with Incyte 
Pharmaceuticals, Inc. ("Incyte"), a leading genomic database company, and 
with Genome Systems, Inc., a subsidiary of Incyte providing positional 
cloning and library screening services, to produce a "bottoms-up" genomic map 
which will map expressed human gene sequences to their human chromosome 
locations.  As part of the collaboration, the Company will have access to 
Incyte's LifeSeq-TM- database for sequence data on expressed human gene 
sequences and use of the developed genomic map.

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY GRANTS

     The Company has been awarded two United States Department of Commerce 
grants totaling $4 million for research related to the Company's 
technologies. These grants are administered through the Advanced Technology 
Program ("ATP") of the National Institute of Standards and Technology 
("NIST") within the United States Department of Commerce. The first grant, 
for research related to the gCGH technology platform, was initiated in March 
1995 and runs through March 1998. The second grant, for research related to 
the development of the Company's Molecular Lawn technology platform and other 
research, was initiated in August 1995 and will run through August 1998.

OTHER COLLABORATIONS

     The Company has also established additional research collaborations 
aimed at generating clinical product opportunities, although there can be no 
assurances of successful development of clinical reagent products based upon 
any of these research efforts. A collaboration with the University of Chicago 
is aimed at producing a set of telomere probes for each human chromosome and 
establishing clinical use of these probes for the diagnosis of mental 
retardation. The Company is developing a RUO FISH probe for detection of a 
chromosomal translocation in pediatric leukemia under an exclusive license 
from St. Jude Children's Research Hospital. The Company's collaboration with 
the Reproductive Genetics Institute is directed at establishing the utility 
of the Company's FISH probes in pre-implantation genetic testing. 

PATENTS, LICENSE RIGHTS AND PROPRIETARY INFORMATION

     The Company currently holds or has exclusive licenses to 92 issued 
United States patents or allowed United States patent applications, to 69 
pending United States patent applications, and to additional foreign patents 
and pending patent applications in various areas of genetic and infectious 
disease testing. The following describes significant patent assets of the 
Company. 

FISH TECHNOLOGY

     U.S. Patent 5,447,841, issued September 5, 1995, licensed exclusively 
from the University of California covers methods of IN SITU hybridization 
using unique sequence probes and unlabeled blocking DNA. These methods permit 
the use as DNA probes of DNA sequences which are produced by standard cloning 
procedures without removal of any repeat DNA sequences which are present. The 
Company believes that the alternative manufacturing technologies to produce 
labeled FISH probes which do not contain the repeat DNA sequences are 
difficult to implement and are not proven commercially. The Company is also 
licensed exclusively under three pending United States divisional patent 
applications stemming from the '841 patent. Each of these applications claims 
priority of the '841 patent applications filed on January 16, 1986 and 
December 1, 1986. The divisional applications cover 


                                       17

<PAGE>

other embodiments of IN SITU hybridization using unique sequence probes, 
including detection of abnormalities on chromosome 21 and detection of gene 
amplification or gene deletion. 

DIRECT LABELING TECHNOLOGY

     U.S. Patent 5,491,224, issued February 13, 1996, and its pending foreign 
counterpart applications, claim the Company's direct label FISH DNA probes 
and their manufacture. U.S. Patent 5,663,319, issued September 2, 1997 covers 
multiple direct label FISH probe compositions. The Company has received a 
counterpart European patent on its direct label FISH DNA probes and on 
methods of IN SITU hybridization using multiple direct label FISH DNA probes. 
The Company has a pending United States divisional patent application of the 
'224 patent claiming use of direct label FISH DNA probes.   The Company 
believes its direct label probes are superior to other probes because they 
produce sharper and brighter fluorescent signals and decrease assay time by 
eliminating procedural steps and reagents, which are required with indirect 
label probes.

CGH AND gCGH TECHNOLOGY

     The Company is exclusively licensed by the University of California 
under U.S. Patent 5,665,549, issued September 9, 1997, and other pending 
United States and foreign patent applications claiming basic CGH methods to 
detect changes in copy number of DNA sequences at a particular chromosome 
location. The Company also holds an option from the University of California 
to obtain an exclusive license to pending U.S. and foreign patent 
applications claiming gCGH assays. 

Q-BETA REPLICASE TECHNOLOGY

     The Company holds exclusive licenses from Columbia University/Salk 
Institute and from PHRI on United States and foreign patents and pending 
patent applications relating to the use of QBR as an amplification technology 
to detect nucleic acid targets. These include U.S. Patent 4,786,600 issued 
November 22, 1988, claiming "substrate" molecules having inserted probe 
sequences which are replicatable by QBR and U.S. Patent 4,957,858, issued 
September 18, 1990, claiming nucleic acid detection assays using QBR. The 
Company also has a number of United States and foreign patents and pending 
patent applications covering QBR and the Molecular Lawn technology. 

CORRELATIONS OF CHROMOSOMAL ABNORMALITIES TO DISEASE

     The Company is pursuing a strategy to acquire rights to methods 
correlating particular genetic aberrations to disease. These rights will 
potentially provide opportunities for exclusive positions on clinical assays. 
For example, U.S. Patent 5,472,842 and its pending foreign counterpart 
applications, licensed exclusively from the University of California, cover 
methods of detection of a chromosomal abnormality on chromosome 20 at locus 
20q13 which has been correlated to certain forms of breast cancer. The 
Company holds an option from the University of California for an exclusive 
license for therapeutic and diagnostic uses to United States and foreign 
patent applications claiming gene sequences in the chromosome 20q13 locus. 
The Company is also exclusively licensed under United States and foreign 
patent applications from the University of California, St. Jude Children's 
Research Hospital and Canji, Inc. claiming methods to diagnose disease based 
upon correlations of particular chromosomal abnormalities for colon cancer, 
breast cancer, lung cancer, bladder cancer, ovarian cancer, prostate cancer, 
gliomas and leukemias. 

ABILITY TO PRACTICE TECHNOLOGY

     The Company's success will depend to a substantial degree upon its 
ability to operate its business and to develop, manufacture, market and sell 
its products without infringing the proprietary rights of third parties. 
However, numerous United States and foreign issued patents and pending patent 
applications, which are owned by third parties, exist in the general fields 
of nucleic acid technology and clinical diagnostic technology. A partial list 
of more specific technologies in these general fields includes patents and 
patent applications relevant to nucleic acid probe manufacturing, labels for 
nucleic acid probes, nucleic acid probe compositions, nucleic acid probe 


                                       18

<PAGE>

hybridization assays, nucleic acid amplification methods, full length gene 
sequences, full length expressed gene sequences, partial gene and expressed 
gene sequences, gene expression assays, correlations of chromosome or gene 
abnormalities to disease, gene point mutation detection assays, 
oligonucleotide array hybridization methods, patient sample processing, fetal 
cell identification and separation, imaging apparatus and methods, infectious 
disease detection assays, food testing assays and apparatus related to these 
technologies. The Company expects that additional United States and foreign 
patents owned by third parties will issue and additional United States and 
foreign patent applications owned by third parties will be filed in these 
fields. The Company further believes that the level of patent competition in 
these fields is sufficiently high that patent litigation in these fields is 
likely to occur. 

     Consequently, the Company believes that its management of the business 
risks presented by the intense patent competition in these fields is critical 
to its ability to operate its business and to develop, manufacture, market 
and sell its products. There can be no assurance that the Company will be 
able to successfully manage these patent business risks to avoid infringing 
the proprietary rights of others nor can there be any assurance that patent 
infringement suits will not be brought against the Company. Any failure in 
its management of these patent business risks may have a material adverse 
impact on the Company's business, financial condition and results of 
operations. 

     The patent position of a company utilizing biotechnology generally is 
highly uncertain and involves complex legal and factual questions. There can 
be no assurance that any patents owned by or licensed to the Company will not 
be challenged and subsequently invalidated or circumvented, or that such 
patents will be sufficiently broad to afford protection against third parties 
who develop or use similar technology, or that any of such patents will be 
successfully asserted against any infringing activity, or that any of the 
Company's patent rights will be successfully cross-licensed to third parties 
in exchange for a license under their patent rights. In addition, there can 
be no assurance that any pending United States or foreign patent applications 
owned or licensed by the Company or those acquired or licensed by the Company 
in the future will result in issued patents, or that such applications will 
not be subject to foreign opposition seeking the revocation of a Company 
patent or to United States patent interference seeking a determination that 
the Company or its collaborators were not the first inventor of a particular 
patent or patent application, or that the Company or its collaborators will 
develop additional technologies that are patentable, or that any patents 
owned or licensed to the Company will provide a basis for commercially viable 
products or services. 

     The Company is also aware of issued United States and foreign patents 
and pending patent applications owned or controlled by third parties, which 
are related to the Company's current or anticipated technologies. 
Specifically, the Company is aware of issued United States and foreign 
patents and pending patent applications owned or controlled by third parties, 
which are related to significant elements of the Company's FISH, CGH and 
direct labeling technologies, or to significant elements of the Company 
anticipated use of its QBR technologies, or to reagents useful in the 
performance of CGH or gCGH assays. Although the Company believes that certain 
of these issued patents are not infringed by the Company's current and 
planned operations, there can be no assurance that the Company would be able 
to successfully assert such a position in the courts, nor that such a 
position could be asserted without the Company incurring substantial or 
prohibitive costs. Furthermore,  because United States patent applications 
are maintained under conditions of confidentiality while the applications are 
pending in the United States Patent and Trademark Office, there may be 
pending patent applications filed by third parties of which the Company is 
unaware and which relate to the Company's current or planned technologies. In 
addition, third parties may in the future file patent applications having 
claims that relate to the Company's services, processes or products. Persons 
holding or licensing patent rights could bring legal actions against the 
Company claiming that any of the Company's marketing, services, processes or 
products, or the Company's collaborators' or its suppliers' services or 
products or of the Company's customers' use of the Company's services or 
products infringe one or more of their patents, and seek damages or 
injunctive relief. Patent litigation is costly, and there can be no assurance 
that the Company would prevail in any patent litigation brought against it. 
Further, the Company could be subject to significant liabilities to such 
persons, may be required to obtain licenses from such persons, or may be 
required to cease certain activities, and any of these could have a material 
adverse effect upon the Company's business, financial condition or results of 
operations. In addition, there can be no assurance that the Company will be 
able to obtain such licenses on commercially reasonable terms, or at all. 

                                       19

<PAGE>

COMPETITION

     Competition in clinical diagnostics and genomics is intense and is 
expected to increase as the market for Genomic Disease Management products 
develops. Competition is and will continue to be based on quality, 
reliability, accuracy, ease of use, price and product line offering. Oncor, 
Inc. ("Oncor") is a major competitor in the supply of FISH products to the 
research market and has recently entered the clinical market with a HER-2/neu 
FISH product. Applied Imaging Corp. and Perceptive Scientific Instruments, 
Inc. compete with Vysis in the marketing of genetic imaging workstations. The 
Company is aware of other entities that currently market RUO nucleic acid 
products, which may have the ability to compete with the Company in the 
clinical market. In addition, many reference laboratories and research 
institutions produce their own FISH probes for internal use. 

     Other companies are developing genomic assessment products including 
"DNA Chip" products for assessment of gene expression or gene sequence with 
potential use for clinical diagnostics. Other diagnostic companies may enter 
the genetic disease diagnostic market with nucleic acid based technologies. 
Many of the Company's existing and potential competitors have substantially 
greater financial, marketing, sales, distribution and technological resources 
than the Company or may have substantial advantages over the Company in terms 
of research and development expertise, experience in conducting clinical 
trials, experience in regulatory matters, manufacturing efficiency, name 
recognition, ability to obtain necessary intellectual property licenses, 
sales and marketing expertise and distribution channels.

GOVERNMENT REGULATION

     The preclinical and clinical testing, manufacturing, labeling, 
distribution and promotion of the Company's products are subject to extensive 
and rigorous government regulation in the United States and other countries. 
Noncompliance with applicable requirements can result in enforcement action 
by the Food and Drug Administration ("FDA") or comparable foreign regulatory 
bodies including, among other things, warning letters, fines, injunctions, 
civil penalties, recall or seizure of products, refusal to grant premarket 
clearances or approvals, withdrawal of marketing approvals and criminal 
prosecution. 

     The Company generally is prohibited from marketing its diagnostic 
products in the United States unless it obtains either 510(k) clearance or 
premarket application ("PMA") approval from the FDA. The Company believes 
that it usually takes from four to 12 months from submission to obtain 510(k) 
clearance, but it can take longer. The process of obtaining PMA approval is 
much more costly, lengthy and uncertain. In any event, there can be no 
assurance that 510(k) clearance or PMA approval will be obtained in a timely 
fashion or at all. Such clearance or approval may also have limitations on 
how the device may be marketed that will limit its sales potential. 

     The Company has completed clinical trials for the FISH detection of 
HER-2/neu amplification in breast cancer. The clinical trial protocols were 
reviewed by the FDA for adequate design to meet the intended use and clinical 
utility claims. The Company obtained verbal permission in March 1997 to 
conduct these trials. A PMA submission is expected to be made to the FDA in the 
first half of 1998. There can be no assurance, however, that the FDA's PMA 
Advisory Panel will agree with the adequacy of the study design. There can be 
no assurance that this product will be approved by the FDA. 

     Some clinical laboratories prepare their own finished diagnostic tests 
using purchased reagents. The FDA has generally not exercised regulatory 
authority over these individual reagents or such finished tests. In November 
1997, the FDA issued new rules for these reagents, individually termed an 
analyte specific reagent ("ASR"), that would apply a regulatory framework to 
them, including restrictions on sales or promotional claims that could be 
made about these products and the restriction of sales to clinical 
laboratories certified under the Clinical Laboratories Improvement Act as 
high complexity testing laboratories. The Company sells on an RUO basis a 
number of individual reagents that likely fall within the ASR regulatory 
framework, which may therefore require changes in the Company's marketing and 
labeling of such products. The Company is currently evaluating the new ASR 
regulatory framework in order to assess the possible impact upon the 
Company's ongoing operations and the marketing of its products as ASRs. 

                                     20

<PAGE>

     Any devices manufactured or distributed by the Company pursuant to FDA 
clearances or approvals will be subject to pervasive and continuing 
regulation by the FDA and certain state agencies. The Company will be subject 
to routine inspection by the FDA and will have to comply with the host of 
regulatory requirements that usually apply to medical devices marketed in the 
United States, including labeling regulations, the QSR, the Medical Device 
Reporting regulation (which requires a manufacturer to report to the FDA 
certain types of adverse events involving its products), and the FDA's 
prohibitions against promoting products for unapproved or "off-label" uses. 
Unanticipated changes in existing regulatory requirements or adoption of new 
requirements could have a material adverse effect on the Company. The 
Company's failure to comply with applicable regulatory requirements could 
result in enforcement action by the FDA or foreign governments, which could 
have a material adverse effect on the Company's business, financial condition 
and results of operations. 

     The President recently signed into law the Food and Drug Administration 
Modernization Act of 1997. This legislation makes changes to the device 
provisions of the Food, Drug and Cosmetic Act and other provisions in the Act 
affecting the regulation of devices. Among other things, the changes will 
affect the 510(k) and PMA processes, and also will affect device standards 
and data requirements, procedures relating to humanitarian and breakthrough 
devices, tracking and postmarket surveillance, accredited third party review, 
and the dissemination of off-label information. The Company cannot predict 
how or when these changes will be implemented or what effect the changes will 
have on the regulation of the Company's products. There can be no assurance 
that the new legislation will not impose additional costs or lengthen review 
times for the Company's products.

EMPLOYEES

     As of March 1, 1998, the Company had 153 full-time employees, of whom 33 
hold Ph.D. degrees, one holds an M.D. degree and 21 hold other advanced 
degrees. Of the Company's total work force, 45 are in research and 
development, 47 are in sales/marketing, 16 are in regulatory affairs, 23 are 
in operations, and 22 are in business development, legal, finance, human 
resources, and administration. The Company believes that its future success 
will depend, in part, on its continuing ability to attract, retain, and 
motivate qualified scientific, technical, and managerial personnel. The 
Company faces intense competition in this regard from other companies, 
research and academic institutions, government entities and other 
organizations. None of the Company's employees is represented by a collective 
bargaining agreement, nor has the Company experienced work stoppages. The 
Company believes that its relations with its employees are good. 

EXECUTIVE OFFICERS

     The executive officers of the Company, their ages as of January 1, 1998 
and their present positions with the Company are as follows: 

<TABLE>
<CAPTION>
NAME                              AGE    POSITION
- ----                              ---    --------
<S>                               <C>    <C>
John L. Bishop. . . . . . . .     53     President, Chief Executive Officer and Director
George R. Kennedy . . . . . .     44     Senior Vice President, Sales and Marketing
Russel K. Enns. . . . . . . .     49     Vice President, Regulatory Affairs
James J. Habschmidt . . . . .     42     Executive Vice President and Chief Financial Officer
James P. Marcella . . . . . .     55     Vice President, Operations
William E. Murray . . . . . .     44     General Counsel and Secretary
Steven A. Seelig. . . . . . .     49     Vice President, Research and Development and Chief Medical Officer
</TABLE>

     MR. JOHN L. BISHOP has served as President and as a Director since 
November 1993 and became Chief Executive Officer in February 1996. Mr. Bishop 
has over 25 years experience in developing and operating diagnostics 
businesses. From 1991 until November 1993, Mr. Bishop was Chairman and Chief 
Executive Officer of MicroProbe Corporation, a manufacturer of DNA probe 
diagnostics and therapeutics and, from 1987 until 1991 of Source Scientific 
Systems, an original equipment manufacturer of automated diagnostic systems. 
From 1984 until 1986, Mr. Bishop was President and Chief Operating Officer of 
Gen-Probe, Inc., a developer and 


                                       21
<PAGE>

manufacturer of DNA probe diagnostics for infectious diseases. From 1968 
until 1984, Mr. Bishop held various management positions with American 
Hospital Supply Company and its affiliates, including a three year assignment 
in Japan as an Executive Vice President and Chief Executive Officer of 
International Reagents Corp., a joint venture between American Hospital 
Supply Company and Green Cross Corporation. 

     MR. GEORGE R. KENNEDY has served as Senior Vice President, Sales and 
Marketing since September 1997. From April 1996 to September 1997 he served 
as Vice President, Sales and Marketing. Prior to joining the Company in April 
1996, Mr. Kennedy was Director of Sales and Marketing of Difco Laboratories, 
a microbiology diagnostic products manufacturer, from June 1992 to April 
1996. From May 1990 to June 1992, Mr. Kennedy was Director of Marketing for 
Dianon Systems, Inc., an oncology reference laboratory. 

     RUSSEL K. ENNS, PH.D., has served as Vice President, Regulatory Affairs 
since he joined the Company in December 1995. Prior to joining the Company, 
Dr. Enns was Vice President of Technical Affairs of MicroProbe Corporation 
from February 1992 to November 1995. From August 1984 to February 1992, Dr. 
Enns held several positions with Gen-Probe, Inc., including Director of 
Product Development and Clinical Development and Director, Technical Affairs. 

     MR. JAMES J. HABSCHMIDT became Vice President of Finance and Chief 
Financial Officer in November 1997 and was named Executive Vice President and 
Chief Financial Officer in February 1998. From September 1993 until November 
1997, Mr. Habschmidt served as Vice President, Development & Finance and 
Chief Financial Officer of Rand McNally & Co., a maker and publisher of maps. 
From January 1991 to September 1993 he served as Executive Vice President 
Operations & Finance of Silvestri Corporation, a designer and marketer of 
home accessories. From 1986 until 1991, Mr. Habschmidt was Vice President, 
Finance and Administration of Kewaunee Scientific Corporation, a developer 
and manufacturer of laboratory equipment, furnishings and accessories. From 
1982 until 1986 he served in financial management positions at American 
Hospital Supply Company prior to and after its acquisition by Baxter 
International, a diagnostic product manufacturer. 

     MR. JAMES P. MARCELLA has served as Vice President, Operations since 
March 1994. Prior to then Mr. Marcella held various managerial positions in 
manufacturing and operations with the Company since December 1991. From April 
1990 to December 1991 he served as Chief Executive Officer of Betagen 
Corporation, a biotechnology company. 

     WILLIAM E. MURRAY, J.D., has served as Vice President and Secretary of 
the Company since March 1994 and Assistant Secretary of the Company from 
September 1992 to March 1994, while employed by Amoco. In January 1996, Mr. 
Murray joined the Company as an executive officer, assuming the additional 
role of General Counsel. Mr. Murray served from 1983 through 1995 in Amoco's 
Law department in both attorney and patent attorney positions. 

     STEVEN A. SEELIG, M.D., PH.D., has served as Vice President, Research 
and Development and Chief Medical Officer since February 1996. He has held 
various research management positions with the Company and its predecessors 
since May 1989. Dr. Seelig was Associate Professor and Director of pediatric 
endocrinology and metabolism at the University of Minnesota from 1985 to 
1989. 

SCIENTIFIC ADVISORY BOARD

     The following individuals comprise Vysis' Scientific Advisory Board, 
which plays an active role in guiding Vysis' research and development 
activities. 

     KURT HIRSCHHORN, M.D., is Professor of Pediatrics, Human Genetics and 
Medicine, Mount Sinai School of Medicine, New York, New York. Dr. Hirschhorn 
is a founding member of the American College of Medical Genetics; serves on 
the Editorial Board or Committee of eight scientific journals; and has worked 
on IN SITU hybridization since the early 1970's. 


                                       22

<PAGE>

     ROBERT B. JENKINS, M.D., PH.D., is Associate Professor of Laboratory 
Medicine, and co-Director of the clinical Cytogenetics and clinical Molecular 
Genetic Laboratories at the Mayo Clinic, Rochester, Minnesota. Dr. Jenkins is 
the Associate Director of the Mayo Clinic's Cytogenetics Laboratory and has 
on-going research programs into the molecular pathology of prostate, breast 
and ovarian cancers and gliomas. Dr. Jenkins has published 43 scientific 
articles on the use of FISH to assess cancer pathology. 

     FRED R. KRAMER, PH.D., is Chairman, Department of Molecular Genetics, 
Public Health Research Institute, New York, New York. Dr. Kramer is the 
co-author of over 30 scientific articles; is the inventor or co-inventor on 
fundamental patents covering QBR based diagnostic assays, which are 
exclusively licensed to the Company; and has led active research on QBR 
assays since 1985. 

     DAVID H. LEDBETTER, PH.D., is Professor of Genetics and Director of the 
Center for Medical Genetics, University of Chicago, Chicago, Illinois. He 
served as Chief, Diagnostic Development Branch of the National Center for 
Human Genome Research at the National Institutes of Health from 1993 to May 
1996, is a Founding Fellow of the American College of Medical Genetics, is on 
the Editorial Board of HUMAN MOLECULAR GENETICS and is also the Chairman of 
the Company's Scientific Advisory Board. 

     KENNETH L. MELMON, M.D., is Professor of Medicine and Molecular 
Pharmacology, Stanford University School of Medicine, Department of Medicine 
and Clinical Pharmacology, Stanford, California. Dr. Melmon was the Arthur L. 
Bloomfield Professor of Medicine at Stanford University School of Medicine 
from 1978-1988; was the Chairman from 1978 to 1984 and Associate Chairman 
from 1989 to 1993 of the Department of Medicine at Stanford University School 
of Medicine; is the Associate Dean for Postgraduate Medical Education; and 
serves as an Editorial Board member or consultant for six scientific 
journals. 

     DAVID H. PERSING, M.D., PH.D., is Associate Professor, Department of 
Laboratory Medicine and Pathology and Department of Clinical Microbiology, 
Mayo Clinic, Rochester, Minnesota. Dr. Persing leads active research into 
infectious disease diagnosis by nucleic acid detection; is the inventor of 
two pending U.S. patent applications on detection of particular pathogens by 
nucleic acid amplification assays; and serves as a regular reviewer for the 
NEW ENGLAND JOURNAL OF MEDICINE. 

     DAN PINKEL, PH.D., is Professor, Department of Laboratory Medicine, UCSF 
Cancer Center, University of California, San Francisco. Dr. Pinkel is the 
author or co-author of over 50 publications on the uses of FISH; is the 
co-inventor of U.S. patents on FISH probes for specific chromosomal locations 
and CGH; and leads active research on gCGH assays. 

     HANS J. TANKE, PH.D., is Chairman, Department of Cytochemistry and 
Cytometry, Sylvius Laboratory, Leiden University, Leiden, The Netherlands. 
Dr. Tanke is the author or co-author of over 130 publications in the fields 
of cytology and molecular biology; is a member of the Editorial Board of 
CYTOMETRY, ANALYTICAL CELLULAR PATHOLOGY AND BIOIMAGING; is the Chairman of 
the EC Network "FISH and Image Analysis"; and leads active research programs 
on detection of IN SITU hybridization results. 

     STEPHEN T. WARREN, PH.D., is Investigator, Howard Hughes Medical Institute,
the William Patterson Timmie Professor of Human Genetics, and Professor of
Biochemistry and of Pediatrics at Emory University School of Medicine, Atlanta,
Georgia. Dr. Warren is a Founding Fellow of the American College of Medical
Genetics and is board certified in clinical cytogenetics and clinical molecular
genetics; is on the Editorial Boards of the AMERICAN JOURNAL OF MEDICAL
GENETICS, GENOMICS, MAMMALIAN GENOME, BIOCHEMICAL AND MOLECULAR MEDICINE, and
HUMAN MOLECULAR GENETICS; and leads active research into the molecular basis of
X chromosome-linked diseases and trinucleotide repeat expansion disorders. 



                                       23

<PAGE>

ITEM 2.  PROPERTIES

FACILITIES

     The Company's executive offices, research and development activities, 
manufacturing operations and administrative support are located in Downers 
Grove, Illinois. This 56,551 square foot facility is leased pursuant to a 
lease that expires on November 30, 2004. Capacity exists at such location to 
expand production to accommodate future growth. 

     The Company also leases 3,300 square feet of space in Stuttgart, Germany 
under a lease that expires in October 2000. The Company has leased 3,014 
square feet near Paris, France under a lease that expires in May 2005. The 
Company's food testing business leases 10,237 square feet in Hopkinton, 
Massachusetts under a lease that expires in January 1999.

ITEM 3.  LEGAL PROCEEDINGS

     (1) The Regents of the University of California (the "Regents") and the 
Company as exclusive licensee, are plaintiffs in a patent infringement suit 
filed September 5, 1995, against Oncor. The suit was filed in the United 
States District Court in San Francisco, California and asserts that Oncor's 
marketing of various DNA probe products infringes the Regents' U.S. Patent 
No. 5,447,841. The Company and the Regents share equally the legal costs of 
this suit. Oncor's answer to the complaint asserts that the patent is invalid 
based on prior art and the failure to disclose the best mode of practicing 
the invention and that it is unenforceable due to inequitable conduct which 
occurred during prosecution of the patent. On August 19, 1997, the court 
issued an order which (i) granted the Regents' and Vysis' motion for claim 
construction and denied Oncor's competing motion for claim construction, (ii) 
granted the Regents' and Vysis' motion for summary judgment that the claims 
were novel and denied Oncor's motion for summary judgment that the claims 
were invalid as anticipated, (iii) granted the Regents' and Vysis' motion for 
summary judgment that the claims were unobvious and denied Oncor's motion for 
summary judgment that the claims were invalid as obvious, (iv) granted in 
part and denied in part the Regents' and Vysis' motion for summary judgment 
that Oncor's use and marketing of its challenged FISH probes infringed the 
claims and denied Oncor's motion for summary judgment that none of its FISH 
probes infringed, (v) granted in part and denied in part the Regents' and 
Vysis' motion for summary judgment regarding the best mode of practicing the 
invention, (vi) denied Oncor's motion for summary judgment that the claims 
were unenforceable because of material misrepresentations made to the U.S. 
Patent & Trademark Office by the Regents during prosecution of the patent, 
and (vii) struck Oncor's motion for summary judgment that the claims were 
unenforceable because the Regents failed to submit material prior art to the 
U.S. Patent & Trademark Office. Oncor resubmitted its motion requesting 
summary judgment that the patent was unenforceable because of the failure to 
submit material prior art to the U.S. Patent & Trademark Office, but the 
court denied this motion in an order dated December 22, 1997.  On February 3, 
1998, Oncor in a letter to the court advised that it would not contest at 
trial the issues of whether its accused probes contained repetitive DNA 
sequences and whether their use on metaphase spreads infringed.  On March 
20, 1998, the Company filed a motion requesting the court to (i) establish 
that the use of Oncor's INFORM Her2/neu product infringes the "841 patent, or 
in the alternative, bar Oncor from introducing evidence at trial that the 
INFORM Her2/neu product does not infringe the patent; (ii) allow the Company 
to introduce evidence at trial of Oncor's abuse of discovery, by the failure 
to furnish to the Company relevant documents during discovery, and the 
submission of false statements to the court; and (iii) order Oncor to pay the 
Company's attorneys' fees of approximately $42,500, which were incurred due 
to the discovery abuse. Oncor has not yet replied to this motion. The trial 
of the remaining issues is scheduled to begin April 20, 1998. The Company 
and Oncor are engaged in discussions regarding a possible settlement of the 
litigation. If Oncor were to succeed in invalidating the patent or having it 
declared unenforceable, this may have a material adverse effect on the 
Company's market position and future business prospects. 

     (2) The Company and Amoco are defendants in a suit pending in the United 
States District Court in San Diego, California brought by Gen-Probe, Inc. 
("Gen-Probe") in June 1995. The suit alleges infringement of U.S. Patent Nos. 
4,851,330 and 5,288,611 (the "Kohne Patents"). The Kohne Patents are alleged 
to apply generally to the detection, identification and quantification of 
non-viral organisms using DNA probes selected to target sequences of 
ribosomal RNA. The allegedly infringing activities are the manufacture, use 
and sale of reagents and kits for detecting certain food pathogens currently 
used in the Company's food testing business. The suit also alleges various 
claims that the Company competed unfairly with Gen-Probe. This suit has been 
stayed pending the outcome of a separate suit brought in California Superior 
Court in San Diego, California against Gen-Probe by the Center for Neurologic 
Study ("CNS") challenging Gen-Probe's claim to sole ownership of the Kohne 
Patents. CNS asserts that the invention of the Kohne Patents were made by 
David Kohne while he was affiliated with CNS and supported by a grant from 
the National Institutes of Health naming CNS as the grantee institution. CNS 
seeks


                                       24

<PAGE>

damages and title in the Kohne Patents. Pursuant to separate agreements 
between Amoco and CNS, which has been assigned to the Company by Amoco, the 
Company reimburses CNS for legal costs incurred in the suits. In return, the 
Company receives contingent rights to acquire an exclusive license with the 
right to grant sub-licenses under such rights as CNS may obtain in the Kohne 
Patents.  Further, the Company has contractually agreed with CNS to grant 
sub-licenses at commercially fair and reasonable terms under the Kohne 
Patents should it acquire the exclusive license. CNS' suit against Gen-Probe 
was bifurcated into two phases. The first phase would be tried by a jury in 
December 1997 and would decide whether certain claims were barred as 
untimely. If the claims were not found to be untimely, the second phase would 
be tried separately in March 1998 and would decide the remaining issues 
raised by CNS. On December 16, 1997, upon completion of the first phase of 
the trial, the jury determined that the claims before it were barred as 
untimely.  As of March 24, 1998, the court has not yet entered the jury 
verdict as a final judgment of the court.  The Company understands that CNS 
and Gen-Probe are also disputing whether the jury verdict applied to all of 
CNS' claims.  The court held a hearing on this issue in late February 1998, 
but as of March 24, 1998 has not decided this dispute.  There can be no 
assurance that the Company will obtain rights under the Kohne Patents. 

     Counterpart applications to the Kohne Patents were filed in Europe, 
Japan and elsewhere. Patents were granted and the Company has opposed these 
patents in Europe and Japan. In Europe the opposition has resulted in the 
withdrawal of the patent. However, the opposition proceeding is not yet 
complete and the withdrawal may be appealed. In Japan, the Company's 
opposition has been rejected and the patent maintained. There can be no 
assurance that Gen-Probe will not assert additional counts of infringement 
based on any additional patents issued from the applications underlying the 
Kohne Patents or will not assert additional causes of action against the 
Company. Although the Company believes that it has meritorious defenses to 
the suit by Gen-Probe against the Company, there can be no assurance that the 
Company will ultimately prevail. An adverse determination could include an 
award of treble damages and/or attorneys' fees, which could have a material 
adverse effect on the financial condition and results of operations of the 
Company. Furthermore, an adverse determination in such suit may limit future 
business opportunities that the Company might otherwise be able to exploit in 
the area of bacterial infectious disease detection. 

     The Company and Amoco have entered into a Cooperation Agreement relating 
to the establishment of the Company as a stand-alone entity. The Cooperation 
Agreement provides that Amoco and the Company will cooperate in the defense 
of the suit brought by Gen-Probe and includes an allocation of any liability 
arising from the Gen-Probe suit or the suit brought by CNS. Under this 
allocation, Amoco has agreed to indemnify the Company against any loss or 
damage based upon Gen-Probe's allegations of unfair competition and related 
claims in the suit. The Company has agreed to indemnify Amoco against any 
loss or damage based upon the patent infringement count in the suit or any 
other cause of action not yet asserted by Gen-Probe. Under this indemnity the 
Company will also be responsible for the attorney's fees and costs associated 
with the defense of the patent infringement count. There can be no assurance 
that the indemnity of the Company by Amoco will prevent an adverse 
determination from having a material adverse impact upon the Company. 

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     In November 1997, Amoco, at the time the owner of approximately 99 
percent of the Company's outstanding Common Stock and all of its outstanding 
preferred stock, approved by written consent (i) a reverse stock split of 
1.37 shares of Common Stock into 1 share of Common Stock, which was effected 
thereafter on November 20, 1997, and (ii) an increase in the authorized share 
capital of the Company to 35 million shares of Common Stock and 10 million 
shares of preferred stock.

                                      PART II

ITEM 5.  MARKET FOR THE REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER
         MATTERS

     The Company's Common Stock is traded on the NASDAQ National Market 
System, ticker symbol VYSI.  Trading in the Company's Common Stock commenced 
on February 5, 1998.


                                       25

<PAGE>

     As of March 23, 1998, there were 9,676,258 shares of Common Stock
outstanding held by approximately 14 shareholders of record.

     The Company has never paid a dividend on its Common Stock. The Company 
currently intends to retain its earnings to finance future growth and does 
not anticipate paying any cash dividends on its Common Stock in the 
foreseeable future. Any determination as to the payment of dividends will 
depend upon the future results of operations, capital requirements and 
financial condition of the Company and its subsidiaries and such other facts 
as the Board of Directors of the Company may consider, including any 
contractual or statutory restrictions on the Company's ability to pay 
dividends.

     On February 28, 1997, the Company granted an option to purchase 1,095 
shares of Common Stock at $2.74 per share to each of the following members of 
the Company's Scientific Advisory Board: Kurt Hirschhorn, M.D., Fred R. 
Kramer, Ph.D., David H. Ledbetter, Ph.D., Kenneth L. Melmon, M.D., Dan 
Pinkel, Ph.D., Hans J. Tanke, Ph.D., and Stephen T. Warren, Ph.D. Each option 
was granted in reliance upon Rule 701 under the Securities Act of 1933, as 
amended, (the "Securities Act") as consideration for bona fide advisory 
services provided by each such individual. 

     On September 17, 1997, the Company issued 553,126 shares of Series B 
Preferred Stock to ATC, the Company's principal stockholder, in reliance upon 
the exemption contained in Section 4(2) of the Securities Act. The shares of 
Series B Preferred Stock were issued in settlement of a $5,106,000 
intercompany balance between the Company and ATC. 

     On September 30, 1997, the Company issued an aggregate of 13,576 shares 
of Common Stock to five individuals upon exercise of employee stock options 
held by them, in reliance upon Rule 701 under the Securities Act. The 
aggregate exercise price of such options was $7,195. 

     On October 15, 1997, the Company agreed to issue, upon the closing of 
the transaction which is expected to occur in June 1998, an aggregate of 
80,291 shares of Common Stock to Aprogenex, Inc., a corporation engaged in 
the development of diagnostic test systems, as partial consideration for 
certain patents and other intellectual property rights of such corporation. 
The shares are to be issued in reliance upon the exemption contained in 
Section 4(2) of the Securities Act. 

     The Company's Form S-1 Registration Statement (File No. 333-38109) which 
registered the Common Stock sold in the Company's IPO was declared effective 
on February 4, 1998.  A total of 4,025,000 shares of Common Stock were 
registered on that Registration Statement, representing a proposed maximum 
aggregate offering price of $60,375,000.  The offering commenced on the 
effective date of the Registration Statement and the purchase of shares of 
Common Stock in the offering closed on February 10, 1998.  A total of three 
million shares of Common Stock were sold in the offering for an aggregate 
offering price of $36,000,000. The managing underwriters for the offering 
were Furman Selz LLC, Deutsche Morgan Grenfell Inc. and EVEREN Securities, 
Inc.  The Company incurred an aggregate of approximately $3.7 million of 
expenses in connection with the offering, consisting of $2.5 million of 
underwriting discounts and commissions and approximately $1.2 million of 
other expenses.  None of such expenses represented direct or indirect 
payments to (i) directors or officers of the Company or their associates, 
(ii) persons owing 10 percent or more of any class of equity securities of 
the Company or (iii) affiliates of the Company.  Information regarding the 
application of the net offering proceeds of $32.3 million will be included in 
subsequent periodic filings of the Company filed pursuant to sections 13(a) 
and 15(d) of the Securities Exchange Act of 1934 commencing with the first 
filing for a reporting period ending after the effective date of the 
Registration Statement. See "Management's Discussion and Analysis of 
Financial Condition and Results of Operations."

ITEM 6.  SELECTED FINANCIAL DATA

     The statement of operations data presented below for the years ended 
December 31, 1994, 1995, 1996 and 1997, and the balance sheet data presented 
below at December 31, 1995, 1996 and 1997 have been derived from the 
financial statements of the Company, which have been audited by Price 
Waterhouse LLP, independent accountants. The statement of operations data for 
the year ended December 31, 1993, the balance sheet data at December 31, 
1993 and 1994, are unaudited but have been prepared on the same basis as the 
audited consolidated financial statements and in the opinion of management 
include all adjustments, consisting of normal recurring 


                                       26

<PAGE>

adjustments, necessary for the fair presentation thereof.  The data presented 
below should be read in conjunction with the Company's Consolidated Financial 
Statements and Notes thereto included elsewhere in this Report. 

<TABLE>
<CAPTION>
                                            YEAR ENDED DECEMBER 31,
                                ------------------------------------------------
                                  1997      1996      1995      1994      1993
                                --------  --------  --------  --------  --------
                                      (in thousands, except per share data)
<S>                             <C>       <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS DATA:
Total revenues................  $ 18,233  $ 13,238  $  7,217  $  5,403  $  3,580
Cost of goods sold............     7,287     5,529     4,022     3,486     2,831
                                --------  --------  --------  --------  --------
Gross profit..................    10,946     7,709     3,195     1,917       749
Research and development......    10,136     9,456     8,871    11,639    10,550
Selling, general and
  administrative..............    17,050    16,286    12,025     8,937     4,541
                                --------  --------  --------  --------  --------
Loss from operations..........   (16,240)  (18,033)  (17,701)  (18,659)  (14,342)
Interest expense, net.........       636      (148)       --        --        --
                                --------  --------  --------  --------  --------
Net loss......................  $(16,876) $(18,181) $(17,701) $(18,659) $(14,342)
                                --------  --------  --------  --------  --------
                                --------  --------  --------  --------  --------
Net loss per basic and
   diluted common share(1)....   $(15.89)  $(17.18)  $(16.72)  $(17.64)  $(13.56)
                                --------  --------  --------  --------  --------
                                --------  --------  --------  --------  --------
Shares used in computing net
  loss per basic and
  diluted share (1)...........     1,062     1,058     1,058     1,058     1,058


                                                 DECEMBER 31,
                                ------------------------------------------------
                                  1997      1996      1995      1994      1993
                                --------  --------  --------  --------  --------
                                                (in thousands)
BALANCE SHEET DATA:
Cash..........................  $    669  $     48  $    247  $     10  $     --
Working capital (deficit).....    (9,138)   (6,622)   (2,625)      758     1,045
Total assets..................    16,940    15,115    19,167    17,574    12,718
Notes payable--Amoco..........     9,202     5,106        --        --        --
</TABLE>
___________

(1)  See "Recent Accounting Pronouncements" Section for information concerning
     the number of shares used in computing net loss per share.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

OVERVIEW

     Vysis is a leading Genomic Disease Management company that develops, 
commercializes and markets clinical products that provide information 
critical to the evaluation and management of cancer, prenatal disorders and 
other genetic diseases. Vysis currently markets five FDA cleared clinical 
products in addition to distributing over 240 research products through its 
direct sales operations in the United States and Europe and a worldwide 
distribution network covering 41 countries. It also markets proprietary 
genetic imaging workstations for clinical and research use, with an installed 
base of over 440 proprietary genetic workstations in 20 countries. The 
Company also develops, manufactures and commercializes products used by food 
processors and quality control laboratories for the detection and 
identification of food-borne pathogens. See Note 10 of Notes to Consolidated 
Financial Statements for financial information of the Company by geographic 
area. 

RESULTS OF OPERATIONS

TWELVE MONTHS ENDED DECEMBER 31, 1997 AND 1996

     Total revenues increased to $18.2 million for the twelve months ended 
December 31, 1997 from $13.2 million for the twelve months ended December 31, 
1996, an increase of $5.0 million or 38 percent. Product sales accounted for 
all of this increase, primarily as a result of increased product shipments in 
the United States and the incorporation of twelve full months of operations 
in France and the United Kingdom. Grant and other revenue in 1997 of $2.2 
million included $1.4 million earned under two United States Department of 
Commerce research 

                                       27

<PAGE>

grants awarded to Vysis in 1995. Both grants are administered through the 
Advanced Technology Program of the National Institute of Standards and 
Technology. Grant and other revenue in 1997 also included revenue of $600,000 
from Fujisawa Pharmaceutical Co., Ltd. ("Fujisawa") pursuant to a 
distribution agreement signed in July 1995. Grant and other revenue for the 
twelve months ended December 31, 1996 of $2.2 million consisted primarily of 
$2.1 million earned under the Company's two above mentioned research grants 
and the Fujisawa agreement. 

     Cost of goods sold increased to $7.3 million for the twelve months ended 
December 31, 1997 from $5.5 million for the twelve months ended December 31, 
1996. The increase in cost of goods sold resulted from an increase in the 
volume of product sold. As a percentage of total revenues, gross profit 
increased from 58.2 percent for the twelve months ended December 31, 1996 to 
60.0 percent for the twelve months ended December 31, 1997, primarily as a 
result of a change in product sales mix toward higher margin products. 

     Research and development expense increased to $10.1 million for the 
twelve months ended December 31, 1997 from $9.5 million for the twelve months 
ended December 31, 1996. The $0.6 million increase is primarily due to 
additional contract research with a collaborative partner.

     Selling, general and administrative expense increased to $17.1 million 
for the twelve months ended December 31, 1997 from $16.3 million for the 
twelve months ended December 31, 1996. This increase was due to an increase 
in selling expense of $2.1 million primarily due to the hiring of additional 
sales and marketing personnel and other expenses incurred in line with the 
overall expansion of operations, partially offset by reduced general and 
administrative expenses of $1.3 million.

     The Company sold two buildings in Framingham, Massachusetts in January 
1996 for $6.7 million in cash. The Company earned interest income from Amoco 
of $107,000 during the twelve months ended December 31, 1996 as a result of 
Amoco's investment of the Company's real estate sale proceeds. The Company 
incurred interest expense of $636,000 during the twelve months ended December 
31, 1997 and $255,000 during the twelve months ended December 31, 1996 
related to the note payable to Amoco. 

TWELVE MONTHS ENDED DECEMBER 31, 1996 AND 1995

     Total revenues increased to $13.2 million for the twelve months ended 
December 31, 1996 from $7.2 million for the twelve months ended December 31, 
1995, an increase of $6.0 million or 83 percent. Product sales, primarily DNA 
probe products and genetic imaging workstations, increased by $4.7 million 
primarily as a result of increased product shipments in the United States and 
Germany and the incorporation of approximately nine months of operations in 
France and the United Kingdom. Grant and other revenue in 1996 of $2.2 
million consisted primarily of $1.4 million earned in connection with the two 
United States Department of Commerce grants and approximately $600,000 
recognized pursuant to the Fujisawa agreement. Grant and other revenue in 
1995 of $900,000 included $559,000 earned in connection with the two United 
States Department of Commerce grants and approximately $300,000 recognized 
pursuant to the Fujisawa agreement. 

     Cost of goods sold increased to $5.5 million for the twelve months ended 
December 31, 1996 from $4.0 million for the twelve months ended December 31, 
1995. The increase in cost of goods sold resulted from an increase in the 
volume of product sold. As a percentage of total revenues, gross profit 
increased from 44.3 percent during 1995 to 58.2 percent for 1996, primarily 
as a result of an increase in grant and other revenue and as a result of a 
change in product sales mix toward higher margin products. 

     Research and development expense increased to $9.5 million for the 
twelve months ended December 31, 1996 from $8.9 million for the twelve months 
ended December 31, 1995. The hiring of additional scientists in 1996 to 
support development of the Company's three technology platforms and DNA probe 
products accounted for a majority of the $600,000 increase. 



                                       28

<PAGE>

     Selling, general and administrative expense increased to $16.3 million 
for the twelve months ended December 31, 1996 from $12.0 million for the 
twelve months ended December 31, 1995. This increase was due to incremental 
general and administrative expenses of $2.2 million primarily attributable to 
the hiring of additional administrative personnel and other expenses incurred 
to support the Company's growth and incremental selling expense of $2.1 
million primarily due to the hiring of additional sales and marketing 
personnel and other expenses incurred in line with the overall expansion of 
operations. 

     Interest income in 1996 totaled $107,000 from Amoco based on the 
proceeds from the sale of two facilities in Framingham, Massachusetts. 
Interest expense in 1996 of $255,000 related to the note payable to Amoco. 

INCOME TAXES

     During the years ended December 31, 1997, 1996 and 1995, the Company's 
results of operations were included in the consolidated income tax returns of 
Amoco.  Accordingly, the Company's domestic net operating losses have been 
utilized by Amoco in its consolidated income tax returns and are not 
available to offset the Company's future taxable income. 

     A full valuation allowance has been provided for all deferred tax assets 
(net of liabilities) at December 31, 1997, as management does not consider 
realization of such amounts more likely than not. On an unaudited pro forma 
separate income tax return basis, assuming the Company was not included in 
the consolidated income tax returns of Amoco, no tax provision or benefit 
would have been recorded in the consolidated financial statements due to the 
ongoing losses of the Company. 

LIQUIDITY AND CAPITAL RESOURCES

     Since inception, the Company has financed its operations primarily 
through capital contributions and loans from Amoco. Capital contributions 
totaled $2.3 million and $15.4 million for the years ended December 31, 1996 
and 1995, respectively. Loans from Amoco totaled $16.7 million and $10.1 
million during the years ended December 31, 1997 and 1996, respectively.  The 
amounts due to Amoco under these loans were reduced by $7.5 million and $5.0 
million, respectively, for the tax benefits recorded by Amoco resulting from 
the inclusion of the Company's domestic net operating losses in Amoco's 
consolidated income tax returns. Additional working capital was provided as a 
result of the Company having sold, in January 1996, its two facilities in 
Framingham, Massachusetts. Net sale proceeds totaled $6.7 million and were 
sufficient to fund the Company's operations for the first five months of 
1996. The net amount due under the note payable to Amoco of $5.1 million at 
December 31, 1996 was converted into 553,126 shares of Series B Preferred 
Stock during September 1997. Amounts received under research grants and a 
distribution agreement have provided cumulative funding of approximately $4.9 
million through December 31, 1997. 

     Net cash used in operating activities was $15.2 million, $17.4 million 
and $11.3 million for the years ended December 31, 1997, 1996 and 1995, 
respectively. Cash used in operating activities relates primarily to ongoing 
operating losses associated with research and development of the Company's 
products and the development of a sales and administrative infrastructure to 
support the Company's business plan. 

     Net cash used in investing activities was $0.8 million and $3.4 million 
for the years ended December 31, 1997 and 1995, respectively, primarily 
relating to the purchase of property and equipment and the increase in other 
assets. Net cash provided by investing activities was $4.7 million for the 
year ended December 31, 1996, primarily resulting from the sales of two 
properties in Framingham, Massachusetts. The Company does not have any 
current material commitments for capital expenditures. 

     Net cash provided by financing activities was $16.7 million, $12.4 
million and $14.9 million for the years ended December 31, 1997, 1996 and 
1995, respectively, resulting from loans and capital contributions received 
from Amoco. 




                                       29

<PAGE>

     The Company has entered into various license agreements pursuant to 
which it has been granted use of certain patented technologies. The 
agreements require the Company to pay royalties ranging from 0.5 percent to 
8.0 percent on net sales of specified products, with certain minimum 
royalties due each year. As additional consideration for certain of the 
licenses, the Company is obligated to fund certain research of the licensors. 
Future minimum amounts due under all such agreements range from $300,000 to 
$1.8 million per year for 1998 through 2002. See Note 7 of Notes to 
Consolidated Financial Statements. 

     At December 31, 1997, the Company had cash of $669,000 and an 
accumulated deficit of $31.9 million (post-recapitalization). The Company has 
experienced negative cash flows from operations for the three years ended 
December 31, 1997. On February 10, 1998, the Company completed an initial 
public offering and issued 3 million shares of Common Stock resulting in net 
cash proceeds of approximately $32.3 million.  From this amount, the Company 
repaid $2.0 million of the remaining note payable to Amoco.  

     The Company believes that the net proceeds from the IPO, and the 
interest to be earned thereon, will be sufficient to fund the Company's 
operations well into 1999. The Company's estimate of the time period for 
which cash funds will be adequate to fund its operations is a forward looking 
estimate subject to risks and uncertainty, and actual results may differ 
materially. The Company's requirements for additional capital will depend on 
many factors, including payments received under existing and potential 
collaborative agreements; the availability of government research grant 
payments; the progress of the Company's collaborative and independent 
research and development projects; the costs of preclinical and clinical 
trials for the Company's products; the prosecution, defense and enforcement 
of patent claims and other intellectual property rights; and the development 
of manufacturing, sales and marketing capabilities. To the extent capital 
resources, including payments from existing and possible future collaborative 
agreements and grants, together with the net proceeds of the IPO are 
insufficient to meet future capital requirements, the Company will have to 
raise additional funds to continue the development of its technologies. There 
can be no assurance that such funds will be available on favorable terms, or 
at all. To the extent that additional capital is raised through the sale of 
equity or convertible debt securities, the issuance of such securities could 
result in dilution to the Company's shareholders. If adequate funds are not 
available, the Company may be required to curtail operations significantly or 
to obtain funds through entering into collaborative agreements on 
unattractive terms. The Company's inability to raise capital as and when 
needed would have a material adverse effect on the Company's business, 
financial condition and results of operations. 

RECENT ACCOUNTING PRONOUNCEMENTS
     
     In 1997, the Company adopted SFAS No. 128, "Earnings per Share," which 
requires presentation of both basic and diluted earnings per share.  Loss per 
share data presented in 1993 through 1996 assumes that the shares issued in 
connection with the 1996 recapitalization (see Note 8 of Notes to 
Consolidated Financial Statements for further discussion) were outstanding 
throughout the entire period 1993 through 1996.

     In June 1997, the FASB issued SFAS No. 131 "Disclosures about Segments 
of an Enterprise and Related Information." SFAS No. 131 establishes new 
standards for reporting information about operating segments in interim and 
annual financial statements. SFAS No. 131 will be effective for the Company 
in 1998. The Company is currently evaluating the impact, if any, this 
statement will have on disclosures in the consolidated financial statements. 

ITEM 8.  FINANCIAL STATEMENTS

     The financial statements of the Company on pages 40 to 43 of this 
Form 10-K are indexed herein under Item 14(a) (1).  See also the financial 
statement schedules appearing herein, as indexed under Item 14(a) (2).

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

     None.



                                       30

<PAGE>

                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Information concerning the Company's Executive Officers is included in Part
I under the caption "Executive Officers."  Listed below are the Company's
Directors and their ages as of January 1, 1998.

<TABLE>
<CAPTION>
NAME                                      AGE    POSITION
- ----                                      ---    --------
<S>                                       <C>    <C>
Robert C. Carr . . . . . . . . . . . .    57     Chairman of the Board of Directors
William M. Bartlett. . . . . . . . . .    65     Director
John L. Bishop . . . . . . . . . . . .    53     President, Chief Executive Officer and Director
Kenneth L. Melmon. . . . . . . . . . .    63     Director
Walter R. Quanstrom. . . . . . . . . .    55     Director
Frank J. Sroka . . . . . . . . . . . .    49     Director
Richard C. Williams. . . . . . . . . .    54     Director
</TABLE>

     All Directors are elected to serve until the next annual meeting of 
stockholders and until their successors are elected and qualified. Officers 
serve at the pleasure of the Board of Directors. 

     MR. ROBERT C. CARR was appointed to the Board of Directors of the 
Company in October 1993 and was elected Chairman of the Company's Board of 
Directors in February 1997. Mr. Carr has served as President of ATC since 
October 1993. Mr. Carr joined Amoco in 1990 and has held various positions 
with Amoco, including Vice President of Chemicals Development and 
Diversification, Vice President and Treasurer, Vice President of Planning and 
Administration, and Vice President and Controller. He has served as Vice 
President Corporate Planning since May 1997. 

     MR. WILLIAM M. BARTLETT has been a Director since September 1997. For 
more than the last five years, Mr. Bartlett has served as a consultant to 
various companies in the healthcare industry. Mr. Bartlett is a director of 
Medco Research, Inc., an adenosine technology and cardiovascular development 
company. Mr. Bartlett has a significant amount of experience in the health 
care industry, having been Chief Executive Officer-Medical Products Group and 
Corporate Vice President for G.D. Searle & Co., a manufacturer and 
distributor of hospital equipment and diagnostic equipment from 1978 to 1982. 
He was also President, Atlantic International Division of American Hospital 
Supply Company from 1975 to 1978 and of the V. Mueller Surgical Instrument 
Division from 1971 to 1975. 

     KENNETH L. MELMON, M.D., has been a Director since September 1997. Dr. 
Melmon has been a Scientific Advisory Board member of the Company since 
August 1994. He is also a director of Epoch, Inc. a biotechnology 
corporation. Since July 1994 he has been Associate Dean, Postgraduate Medical 
Education at Stanford University School of Medicine. Dr. Melmon was Associate 
Chairman, Department of Medicine at the Stanford University School of 
Medicine from July 1989 to July 1993 and was Chairman, Stanford University 
Hospital Technology Transfer Program from July 1988 to July 1993. He was 
Chairman, Department of Medicine at the Stanford University School of 
Medicine from 1978 to 1984 and has been Professor of Medicine and Molecular 
Pharmacology since 1978. 

     WALTER R. QUANSTROM, PH.D., has been a Director since September 1997. 
Dr. Quanstrom is presently Vice President of Environment, Health and Safety 
and has held such position with Amoco since 1987. 

     MR. FRANK J. SROKA, J.D., was appointed to the Board of Directors of the 
Company in September 1993. Mr. Sroka has served as General Attorney for Amoco 
with responsibility for the legal matters of ATC and its subsidiaries since 
September 1993. Prior to such position, Mr. Sroka held positions in the 
Research, Patents & Licensing and Law departments of Amoco since 1970.


                                       31

<PAGE>

     MR. RICHARD C. WILLIAMS has been a Director since September 1997. Mr. 
Williams has served as President of Connor-Thoele Limited, a consulting and 
financial advisory firm which serves the healthcare and pharmaceuticals 
industry since March 1989. Mr. Williams has served as Chairman of the Board 
of Directors since October 1992 and as a director of Medco Research, Inc. 
since January 1991, as a director of Centaur, Inc., a private equine 
diagnostic company, since January 1991 and as a director of Immunomedics, 
Inc., a biopharmaceutical research company, since March 1993. Prior to these 
positions Mr. Williams has gained extensive experience in the healthcare 
industry, most notably as Vice President and Chief Financial Officer of 
Erbamont, N.V., a pharmaceutical company, and at Abbott Laboratories and 
American Hospital Supply Company where he held a variety of financial 
management positions.

ITEM 11.  EXECUTIVE COMPENSATION

EXECUTIVE COMPENSATION

     The following table sets forth the amounts paid by the Company during the
fiscal year indicated to (i) the Company's Chief Executive Officer (the "CEO")
and (ii) the four other most highly compensated executive officers (the "Named
Executive Officers") whose compensation exceeded $100,000 for services rendered
to the Company. 

<TABLE>
<CAPTION>
NAMES AND PRINCIPAL                                     STOCK         ALL OTHER
POSITION                     YEAR   SALARY    BONUS   OPTIONS #    COMPENSATION(1)
- ---------------------------  ----  --------  -------  ---------   -----------------
<S>                          <C>   <C>       <C>      <C>         <C>
John L. Bishop.............  1997  $224,035  $25,000        --         $ 4,750
President and                1996  210,000   36,500    131,387          18,946
Chief Executive Officer
George R. Kennedy..........  1997  153,877       --      7,300           3,468
Senior Vice President        1996  123,258       --     36,497          36,480
Sales and Marketing
Steven A. Seelig...........  1997  138,910       --         --           2,240
Vice President               1996  130,200       --     65,694           4,007
Research and Development
  and Chief Medical Officer
James P. Marcella..........  1997  129,385       --         --           3,882
Vice President               1996  125,000   15,000     32,847           3,822
Operations
Russel K. Enns.............  1997  116,654       --     10,949          74,219
Vice President               1996  110,000       --     21,898             635
Regulatory Affairs
</TABLE>
___________

(1)  Amounts represent the Company's 401(k) contributions made on behalf of each
     of the named individuals and the reimbursement of 1996 relocation expenses
     in the amounts of $14,446 for Mr. Bishop and $34,305 for Mr. Kennedy and
     1997 relocation expenses in the amount of $74,219 for Dr. Enns. 

DIRECTOR COMPENSATION

     Messrs. Bartlett, Melmon and Williams each receive a fee of $2,000 per 
month and $2,000 per board meeting attended. None of the remaining directors 
receive any compensation for serving on the Board of Directors.

STOCK OPTION GRANTS IN LAST FISCAL YEAR

     The following table summarizes options to purchase shares of the 
Company's Common Stock granted during the fiscal year ended December 31, 1997 
to the Company's CEO and the Named Executive Officers. The 


                                       32

<PAGE>

amounts shown as potential realizable values on the options identified in the 
table are based on assumed annualized rates of appreciation in the price of 
the Common Stock of five percent and ten percent over the term of the 
options, as set forth in the rules of the Securities and Exchange Commission. 
Actual gains, if any, on stock option exercises depend on the future 
performance of the Common Stock. There can be no assurance that the potential 
realizable values reflected in this table will be achieved. 

<TABLE>
<CAPTION>
                                                                        POTENTIAL REALIZED VALUE
                                      % OF TOTAL                            AT ASSUMED ANNUAL
                         NUMBER OF     OPTIONS                            RATES OF STOCK PRICE
                          SHARES      GRANTED TO                         APPRECIATION FOR OPTION
                        UNDERLYING    EMPLOYEES                                    TERM
                         OPTIONS      IN FISCAL   EXERCISE  EXPIRATION  -------------------------
NAME                     GRANTED        YEAR       PRICE      DATE          5%             10%
- ----                    ----------    ----------  --------  ----------     ----           -----
<S>                     <C>           <C>         <C>       <C>           <C>          <C>
George R. Kennedy. .     7,300          4.5%        $6.85   8/29/07       $31,448      $ 79,695
Russel K. Enns . . .    10,949          2.5          6.85   8/29/07        47,168       119,532
</TABLE>

AGGREGATE OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR-END OPTION VALUES

     The following table sets forth for the Company's CEO and the Named
Executive Officers aggregated information concerning each exercise of stock
options during the fiscal year ended December 31, 1997, and the fiscal year-end
value of unexercised options. 

<TABLE>
<CAPTION>
                                                    NUMBER OF         VALUE OF UNEXERCISED
                                                   UNEXERCISED        IN-THE-MONEY OPTIONS
                                                 OPTIONS AT FISCAL     AT FISCAL YEAR-END
                            SHARES                  YEAR-END (#)             ($)(1)
                           ACQUIRED    VALUE     -----------------    --------------------
                         ON EXERCISE  REALIZED     EXERCISABLE/           EXERCISABLE/
NAME                         (#)        ($)       UNEXERCISABLE           UNEXERCISABLE
- ----                        ----       ----       -------------           -------------
<S>                      <C>          <C>         <C>                  <C>
John L. Bishop . . . .       --         --         71,181/60,206        $887,627/750,769
Steven A. Seelig . . .       --         --         35,591/30,103         443,820/375,384
James P. Marcella. . .       --         --         17,796/15,051         221,916/187,686
George R. Kennedy. . .       --         --         15,970/27,827         199,146/300,867
Russel K. Enns . . . .       --         --         11,864/20,983         147,944/192,460
</TABLE>

___________
(1)  Based on a December 31, 1997 estimate of fair market value of $13.00 per
     share. 

CONSULTING AGREEMENTS

     Prior to their appointment to the Board of Directors in September 1997, 
each of Messrs. Bartlett, Melmon and Williams was a party to an advisory 
board consulting agreement with the Company pursuant to which each of such 
individuals provided consulting services to the Company through service on 
the Company's advisory board. Such advisory board had been maintained since 
August 1994 for the purpose of rendering informal advice to the Company 
regarding medical and technology issues as well as business, operational and 
financial matters. Under such consulting agreements, these individuals were 
paid in cash the following amounts in 1997: Mr. Bartlett, $53,253; Dr. 
Melmon, $45,625; and Mr. Williams, $59,575. (In the case of Mr. Williams, the 
amounts shown include amounts paid to Conner-Thoele Limited, an advisory firm 
of which Mr. Williams is president). Such consulting agreements have been 
terminated. 

     In addition, as consideration for rendering services relating to 
attendance at meetings of the Board of Directors, the Company granted during 
1997 to each of Messrs. Bartlett, Melmon and Williams, options to 


                                       33

<PAGE>

purchase an aggregate of 25,549 shares of Common Stock at an exercise price 
of $2.74 per share as follows: Mr. Bartlett, 7,300 shares; Dr. Melmon, 10,949 
shares; and Mr. Williams, 7,300 shares. Dr. Melmon also was granted an option 
to purchase 1,095 shares of Common Stock in 1997, with an exercise price of 
$2.74 per share as consideration for rendering consulting services as a 
member of the Company's Scientific Advisory Board.

COMPENSATION COMMITTEE

     Compensation information with respect to the Company's CEO and the Named 
Executive Officers for 1996 reflects compensation earned while the Company 
was an indirect, wholly owned subsidiary of Amoco. During 1996, the Company 
had no compensation committee. Executive compensation levels during 1996 were 
established by the Company's Board of Directors. Executive compensation 
levels for 1997 were also established by the Company's Board of Directors 
prior to the formation of the compensation committee in October 1997. 

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

OWNERSHIP OF COMPANY COMMON STOCK

     The following table sets forth certain information regarding the 
beneficial ownership of Common Stock by each person known by the Company to 
be the beneficial owner of 5 percent or more of the outstanding Common Stock, 
by each of the Company's directors and the Named Executive Officers and by 
all directors and executive officers of the Company as a group, as of March 
1, 1998. The beneficial ownership reflected in the following table is 
calculated in accordance with Section 13(d) of the Exchange Act.  Unless 
otherwise indicated, ownership includes sole voting and investment power. 

<TABLE>
<CAPTION>
                                                 SHARES BENEFICIALLY
                                                      OWNED (1)
                                               -----------------------
                                                 NUMBER        PERCENT
                                               ------------    -------
<S>                                            <C>             <C>
Amoco Corporation . . . . . . . . . . . . . .  6,662,682(2)     68.9%
200 East Randolph Drive
Chicago, Illinois 60601
John L. Bishop. . . . . . . . . . . . . . . .     82,133         *
Russel K. Enns. . . . . . . . . . . . . . . .     13,689         *
George R. Kennedy . . . . . . . . . . . . . .     19,013         *
James P. Marcella . . . . . . . . . . . . . .     20,534         *
Steven A. Seelig. . . . . . . . . . . . . . .     41,067         *
William M. Bartlett . . . . . . . . . . . . .     11,789         *
Robert C. Carr. . . . . . . . . . . . . . . .         --         *
Kenneth L. Melmon . . . . . . . . . . . . . .     12,701         *
Walter R. Quanstrom . . . . . . . . . . . . .         --         *
Frank J. Sroka. . . . . . . . . . . . . . . .         --         *
Richard C. Williams . . . . . . . . . . . . .     16,789         *
Directors and Executive Officers as a Group
   (13 persons). . . . . . . . . . . . . . . .   276,842         2.8%
</TABLE>
___________

*    Less than 1 percent 

(1)  The share amounts include those shares as to which the following persons
     had a right to acquire beneficial ownership by exercising stock options as
     of March 1, 1998, or  within 60 days after that date; Mr. Bishop, 82,133
     shares; Dr. Enns, 13,689 shares; Mr. Kennedy, 19,013 shares; Mr. Marcella,
     20,534 shares; Dr. Seelig, 41,067 shares; Mr. Bartlett, 11,789 shares; Dr.
     Melmon, 12,701 shares; Mr. Williams, 11,789 shares; and all directors and
     executive officers as a group, 221,842 shares.


                                       34

<PAGE>

(2)  All such shares of Common Stock are owned of record by ATC, a wholly owned
     subsidiary of Amoco. 

OWNERSHIP OF PARENT STOCK

     The following table sets forth at January 1, 1998, the ownership of common
stock, no par value per share, of Amoco Corporation by the Company's directors,
the Named Executive Officers, and all directors and executive officers of the
Company as a group. Unless otherwise indicated, the persons named below have
sole voting and investment power with respect to the shares beneficially owned
by them. The directors and executive officers of Vysis own in the aggregate less
than one percent of the common stock of Amoco Corporation. 

<TABLE>
<CAPTION>
                                                               TOTAL SHARES
NAME                                                        BENEFICIALLY OWNED(1)
- ----                                                        ---------------------
<S>                                                         <C>
John L. Bishop . . . . . . . . . . . . . . . . . . . . . .            55
Russel K. Enns . . . . . . . . . . . . . . . . . . . . . .            --
George R. Kennedy. . . . . . . . . . . . . . . . . . . . .            --
James P. Marcella. . . . . . . . . . . . . . . . . . . . .            --
Steven A. Seelig . . . . . . . . . . . . . . . . . . . . .         3,646
William M. Bartlett. . . . . . . . . . . . . . . . . . . .            --
Robert C. Carr . . . . . . . . . . . . . . . . . . . . . .        62,243
Kenneth L. Melmon. . . . . . . . . . . . . . . . . . . . .            --
Walter R. Quanstrom(2) . . . . . . . . . . . . . . . . . .        72,071
Frank J. Sroka(3). . . . . . . . . . . . . . . . . . . . .        29,652
Richard C. Williams. . . . . . . . . . . . . . . . . . . .            --
Directors and Executive Officers as a Group
   (13 persons)(2)(3). . . . . . . . . . . . . . . . . . .       167,423
</TABLE>
___________

(1)  The share amounts include those shares as to which the following persons
     had a right to acquire beneficial ownership by exercising stock options as
     of January 1, 1998, or  within 60 days after that date; Dr. Seelig, 800
     shares; Mr. Carr, 59,500 shares; Dr. Quanstrom, 55,000 shares; Mr. Sroka,
     19,800; and all directors and executive officers as a group, 135,100
     shares. Also included are shares owned in the Amoco Performance Share Plan
     and those allocable to the Amoco Stock Fund accounts of participants in the
     Amoco Employee Savings Plan. 

(2)  Includes 500 shares as to which Dr. Quanstrom shares voting and dispositive
     authority. 

(3)  Includes 2,068 shares as to which Mr. Sroka shares voting and dispositive
     authority. 

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Prior to the consummation of the Initial Public Offering (IPO), the 
Company operated as a subsidiary of Amoco. In connection therewith, the 
Company engaged in a variety of transactions with Amoco and may continue to 
do so on a more limited basis in the future. 

     The Company has in the past received certain legal services (internal 
and external), research and development support, and administrative support 
from Amoco and has paid for such services and support on an actual usage or 
pro rata basis. The amount of these costs allocated to the Company aggregated 
$182,000, $304,000 and $3,058,000 in 1997, 1996 and 1995, respectively. In 
addition, the Company received funding requirements and assets from Amoco. 



                                       35


<PAGE>

     The costs of these services, funding requirements and asset transfers 
were accounted for by Amoco as intercompany receivables from Vysis. These 
receivables were periodically converted into equity of Vysis. This investment 
by Amoco in the Company aggregated $2,315,000 and $15,384,000 in 1996 and 
1995. Additionally in 1996, such amounts were also represented by a note 
payable to Amoco. At December 31, 1996, the balance of the note payable was 
$5,106,000. This note was subsequently converted into 553,126 shares of 
Series B Preferred Stock. The sharing of costs and funding continued during 
1997 and the first quarter of 1998, with the aggregate amount of such costs 
and funding represented by a promissory note that accrued interest at 7.5 
percent per annum.  As of February 10, 1998, the balance of the note payable 
was approximately $10.1 million due from the Company to Amoco. Upon 
consummation of the IPO, $8.1 million of the principal of this note was 
converted into Common Stock of the Company and approximately $2.0 million of 
the principal and accrued interest was repaid with a portion of the proceeds 
of the IPO.

     The Company and Amoco have entered into a Cooperation Agreement, which 
sets out the terms on which Amoco and the Company will cooperate in handling 
various matters. These matters include (i) documentation of the assignment to 
the Company of certain intellectual property rights, (ii) the Gen-Probe 
litigation, (iii) retention by Amoco of certain liabilities relating to ATC's 
discontinued operations, and (iv) access to Amoco's and the Company's 
business records. See "Legal Proceedings."

     Prior to the completion of the IPO, the Company has been included in the 
consolidated or combined federal and state income tax returns of Amoco. For 
periods after the completion of the IPO, the Company will no longer be 
included in Amoco's federal consolidated returns, although it may continue to 
be included in one or more state or local combined returns. Pursuant to an 
Amended and Restated Tax Allocation Agreement, for periods during which the 
Company is included in Amoco's federal consolidated return, the Company 
generally receives no credit for tax benefits accruing during such periods to 
other members of the Amoco consolidated group as a result of any deductions 
or losses incurred by the Company; except that beginning in 1996, debt 
obligations of the Company owed to Amoco are to be reduced by approximately 
35 percent of the Company's estimated income or loss for income tax purposes, 
resulting in an aggregate reduction of the Company's debt to Amoco with an 
offsetting increase to contributed capital of approximately $5.0 million for 
1996 and $7.5 million for 1997. Subsequent to the completion of the IPO, the 
Company will no longer be included in the consolidated federal tax return of 
Amoco. 

     Under state tax laws in a number of states, including Illinois (the 
state in which much of the Company's business is taxed), the Company is 
required by law to be included in Amoco's unitary state tax returns as long 
as Amoco owns or controls 50 percent or more of the voting equity of the 
Company. Immediately subsequent to the IPO, Amoco owned approximately 69 
percent of the voting equity. Under the Amended and Restated Tax Allocation 
Agreement, for tax periods subsequent to the IPO, the Company pays Amoco, or 
Amoco pays the Company, as the case may be, an amount determined on the basis 
of a comparison between the actual combined tax liability of Amoco and the 
liability that would have arisen had the Company been excluded from Amoco's 
unitary return. For tax periods prior to the IPO, the Company's state tax 
liability is determined by Amoco based upon their internal allocation 
methodology. The application of this methodology resulted in a charge to the 
Company of $53,000 for unitary state taxes in 1996. Such charge, if any, for 
state income taxes from the period January 1, 1997 through the effective date 
of the IPO will also be immaterial. In addition, in such unitary states the 
Company will not have the future benefit of tax loss carry-forwards that 
would have arisen but for the legal requirement that the Company be included 
in Amoco's unitary tax return. 

     Immediately prior to the completion of the IPO, Vysis and Amoco entered
into a registration rights agreement (the "Registration Agreement") pursuant to
which Vysis granted Amoco registration rights under the Securities Act with
respect to the shares of Common Stock owned by Amoco. Under the Registration
Agreement, Amoco will have the right commencing on August 3, 1998 to demand that
the Company register its shares under the Securities Act. However, Amoco has
agreed with the underwriters of the Company's IPO that it will not sell any
shares of Common Stock prior to February 4, 1999 without the prior written
consent of Furman Selz LLC (other than the 675,000 shares issuable to Amoco upon
consummation of the IPO, which may not be sold prior to August 3, 1998 without
such consent). Under the Registration Agreement, Amoco may only sell securities
under one effective demand registration per calendar year and the right may only
be exercised with respect to specified

                                       36

<PAGE>

minimum amounts of shares of Common Stock. The Company may postpone such a 
demand under certain circumstances. Amoco will have the right to include 
shares of Common Stock owned by it in any registration proposed by the 
Company under the Securities Act, subject to certain limitations. 

     Three current directors of the Company (Messrs. Bartlett, Melmon and 
Williams) have provided consulting services to the Company from time to time. 
See "Executive Compensation--Consulting Agreements." 

                                          
                                   PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

     14(a)(1)  CONSOLIDATED FINANCIAL STATEMENTS

     Set forth below is a listing of the Consolidated Financial Statements of 
the Company with reference to the page numbers in this Form 10-K at which 
such Statements are disclosed.

<TABLE>
<CAPTION>
                                                                 PAGE NUMBERS OF
                                                                 THIS FORM 10-K
                                                                 ---------------
<S>                                                              <C>
Report of Management. . . . . . . . . . . . . . . . . . . . . .        38
Report of Independent Accountants . . . . . . . . . . . . . . .        39
Consolidated Balance Sheet--December 31, 1997 and 1996. . . . .        40
Consolidated Statement of Operations for the Years Ended
   December 31, 1997, 1996 and 1995 . . . . . . . . . . . . . .        41
Consolidated Statement of Stockholders' Equity (Deficit) for
   the Years Ended December 31, 1997, 1996 and 1995 . . . . . .        42
Consolidated Statement of Cash Flows for the Years Ended
   December 31, 1997, 1996 and 1995 . . . . . . . . . . . . . .        43
Notes to Consolidated Financial Statements. . . . . . . . . . .        44
</TABLE>

     14(a)(2) CONSOLIDATED FINANCIAL STATEMENT SCHEDULES

     The documents and schedules listed below are filed as part of this report:

<TABLE>
<CAPTION>
                                                                 PAGE NUMBER OF
                                                                 THIS FORM 10-K
                                                                 ---------------
<S>                                                              <C>
Schedule II--Allowance for Doubtful Accounts . . . . . . . . .         55
</TABLE>

     All other schedules have been omitted since they are not required, not
applicable, or the information is included in the Consolidated Financial
Statements or notes thereto.

     14(a)(3)  EXHIBITS

     The exhibits filed as part of this annual report are listed in the 
Exhibit Index immediately preceding the exhibits.  The Company has identified 
in the Exhibit Index each management contract and compensation plan filed as 
an exhibit to this Form 10-K in response to Item 14(c) of Form 10-K.

     14(b)  REPORTS ON FORM 8-K

     No Form 8-K reports were filed during the fourth quarter of 1997.



                                       37

<PAGE>

                             REPORT OF MANAGEMENT

     The accompanying consolidated financial statements and related 
information of Vysis, Inc. and subsidiaries (the "Company") have been 
prepared by management, which is responsible for their integrity and 
objectivity.  The statements have been prepared in conformity with generally 
accepted accounting principles and necessarily include some amounts based on 
management's best estimates and judgments.

     Management is also responsible for maintaining a system of internal 
controls as a fundamental requirement for the operational and financial 
integrity of results.  The Company has established and maintains a system of 
internal controls designed to provide reasonable assurance that the books and 
records reflect the transactions of the Company and that its established 
policies and procedures are carefully followed.  The Company's internal 
control system is based upon standard procedures, policies and guidelines and 
organizational structures that provide an appropriate division of 
responsibility and the careful selection and training of qualified personnel. 
On an ongoing basis, the system of internal controls is reviewed, evaluated 
and revised as necessary in light of the results of constant management 
oversight, independent audits, changes in Vysis' business and other 
conditions.

     The Company's accompanying consolidated financial statements have been 
audited by Price Waterhouse LLP, independent accountants, whose audit was 
made in accordance with generally accepted auditing standards.  Management 
has made available to Price Waterhouse LLP all of the Company's financial 
records and related data, as well as the minutes of stockholders' and 
directors' meetings.  Furthermore, management believes that all 
representations made to Price Waterhouse LLP during its audit were valid and 
appropriate.  The Report of Independent Accountants appears herein.

     The Board of Directors exercises its oversight responsibility for the 
consolidated financial statements through its Audit Committee, comprised of 
Directors who are not employees of the Company. To assure independence, Price 
Waterhouse LLP has full and free access to the Audit Committee to discuss 
internal accounting control, auditing and financial reporting matters.

JOHN L. BISHOP                         JAMES J. HABSCHMIDT
President and Chief                    Executive Vice President and
Executive Officer                      Chief Financial Officer












                                       38

<PAGE>

                         REPORT OF INDEPENDENT ACCOUNTANTS
        
To the Board of Directors and Stockholders of Vysis, Inc.

     In our opinion, the consolidated financial statements listed in the 
index appearing under Item 14(a)(1) and Item (14)(a)(2) on page 37 present 
fairly, in all material respects, the financial position of Vysis, Inc. (an 
indirect subsidiary of Amoco Corporation) and its subsidiaries at December 
31, 1997 and 1996, and the results of their operations and their cash flows 
for each of the three years in the period ended December 31, 1997, in 
conformity with generally accepted accounting principles.  These financial 
statements are the responsibility of Vysis, Inc.'s management; our 
responsibility is to express an opinion on these financial statements based 
on our audits.  We conducted our audits of these statements in accordance 
with generally accepted auditing standards which require that we plan and 
perform the audit to obtain reasonable assurance about whether the financial 
statements are free of material misstatement.  An audit includes examining, 
on a test basis, evidence supporting the amounts and disclosures in the 
financial statements, assessing the accounting principles used and 
significant estimates made by management, and evaluating the overall 
financial statement presentation.  We believe that our audits provide a 
reasonable basis for the opinion expressed above.

PRICE WATERHOUSE LLP

Chicago, Illinois
March 13, 1998




















                                       39

<PAGE>

                                  VYSIS, INC.
                (AN INDIRECT SUBSIDIARY OF AMOCO CORPORATION)
                                        
                           CONSOLIDATED BALANCE SHEET
                                        
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
                                        
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                              ------------------
                                                                1997      1996
                                                              --------  --------
<S>                                                           <C>       <C>
ASSETS
Current assets:
  Cash......................................................  $    669  $     48
  Accounts receivable, net..................................     4,629     2,801
  Inventories...............................................     2,733     2,390
  Other current assets......................................     1,108       761
                                                              --------  --------
        Total current assets................................     9,139     6,000

Property and equipment, net.................................     4,646     5,557
Investment..................................................       677       100
Goodwill, net...............................................       297       388
Other assets................................................     2,181     3,070
                                                              --------  --------
        Total assets........................................  $ 16,940  $ 15,115
                                                              --------  --------
                                                              --------  --------
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Current liabilities:
  Accounts payable and accrued liabilities..................  $  8,538  $  7,109
  Notes payable--Amoco......................................     9,202     5,106
  Deferred revenue..........................................       537       407
                                                              --------  --------
        Total current liabilities...........................    18,277    12,622
                                                              --------  --------
Commitments and contingencies (Notes 7, 11 and 13)

Stockholders' equity (deficit):

  Convertible Preferred Stock, $0.001 par value; 10,000,000
    shares authorized:
    Series A; 6,200,000 shares designated, issued and
     outstanding at December 31, 1997 and December 31,
     1996...................................................         6         6
    Series B; 553,126 designated, issued and outstanding at
     December 31, 1997; none issued and outstanding at
     December 31, 1996......................................         1        --
  Common stock, $0.001 par value; 35,000,000 shares
    authorized; 1,071,970 issued and outstanding at December
    31, 1997; 1,058,394 shares issued and outstanding at
    December 31, 1996.......................................         1         1
  Additional paid-in capital................................    30,396    17,555
  Deferred compensation.....................................      (206)      (90)
  Unrealized gain on investment.............................       577        --
  Cumulative translation adjustment.........................      (241)       16
  Accumulated deficit.......................................   (31,871)  (14,995)
                                                              --------  --------
        Total stockholders' equity (deficit)................    (1,337)    2,493
                                                              --------  --------
        Total liabilities and stockholders' equity..........  $ 16,940  $ 15,115
                                                              --------  --------
                                                              --------  --------
</TABLE>


   The accompanying notes are an integral part of these financial statements.




                                       40

<PAGE>

                                  VYSIS, INC.
               (AN INDIRECT SUBSIDIARY OF AMOCO CORPORATION)

                    CONSOLIDATED STATEMENT OF OPERATIONS

                  (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                                    ----------------------------
                                                      1997      1996      1995
                                                    --------  --------  --------
<S>                                                 <C>       <C>       <C>
Revenues:
  Product sales...................................  $ 16,021  $ 11,022  $  6,296
  Grant and other revenue.........................     2,212     2,216       921
                                                    --------  --------  --------
        Total revenues............................    18,233    13,238     7,217
Cost of goods sold................................     7,287     5,529     4,022
                                                    --------  --------  --------
Gross profit......................................    10,946     7,709     3,195
                                                    --------  --------  --------
Operating expenses:
  Research and development........................    10,136     9,456     8,871
  Selling, general and administrative.............    17,050    16,286    12,025
                                                    --------  --------  --------
        Total operating expenses..................    27,186    25,742    20,896
                                                    --------  --------  --------
Loss from operations..............................   (16,240)  (18,033)  (17,701)
                                                    --------  --------  --------
Interest income--Amoco............................        --       107        --
Interest expense--Amoco...........................      (636)     (255)       --
                                                    --------  --------  --------
Net loss..........................................  $(16,876) $(18,181) $(17,701)
                                                    --------  --------  --------
                                                    --------  --------  --------
Basic and diluted net loss per share..............  $ (15.89) $ (17.18) $ (16.72)
                                                    --------  --------  --------
                                                    --------  --------  --------

Shares used in computing basic and diluted
    net loss per share............................     1,062     1,058     1,058
</TABLE>


   The accompanying notes are an integral part of these financial statements.














                                       41

<PAGE>

                                  VYSIS, INC.
                 (AN INDIRECT SUBSIDIARY OF AMOCO CORPORATION)
                                        
            CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT)
                                        
                                 (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                                    ----------------------------
                                                      1997      1996      1995
                                                    --------  --------  --------
<S>                                                 <C>       <C>       <C>
Convertible Preferred Stock:
  Beginning balance...............................  $      6  $     --  $     --
  Recapitalization................................        --         6        --
  Issuance of Series B convertible Preferred
    Stock.........................................         1        --        --
                                                    --------  --------  --------
  Ending balance..................................         7         6        --
                                                    --------  --------  --------
Common stock:
  Beginning balance...............................         1        --        --
  Recapitalization................................        --         1        --
                                                    --------  --------  --------
  Ending balance..................................         1         1        --
                                                    --------  --------  --------
Additional paid-in capital:
  Beginning balance...............................    17,555        --        --
  Recapitalization................................        --    12,311        --
  Income tax benefit from Amoco...................     7,451     5,031        --
  Deferred compensation...........................       277       213        --
  Conversion of note payable--Amoco...............     5,105        --        --
  Exercise of stock options.......................         8        --        --
                                                    --------  --------  --------
  Ending balance..................................    30,396    17,555        --
                                                    --------  --------  --------
Capital contribution--Amoco:
  Beginning balance...............................        --    13,189    15,506
  Net loss (pre-recapitalization).................        --    (3,186)  (17,701)
  Advances from Amoco.............................        --     2,315    15,384
  Recapitalization................................        --   (12,318)       --
                                                    --------  --------  --------
  Ending balance..................................        --    13,189        --
                                                    --------  --------  --------
Deferred compensation:
  Beginning balance...............................       (90)       --        --
  Stock option grants.............................      (277)     (213)       --
  Amortization....................................       161       123        --
                                                    --------  --------  --------
  Ending balance..................................      (206)      (90)       --
                                                    --------  --------  --------
Unrealized gain on investments:
  Beginning balance...............................        --        --        --
  Current year activity...........................       577        --        --
                                                    --------  --------  --------
  Ending balance..................................       577        --        --
                                                    --------  --------  --------
Cumulative translation adjustment:
  Beginning balance...............................        16        (4)        4
  Current year activity...........................      (257)       20        (8)
                                                    --------  --------  --------
  Ending balance..................................      (241)       16        (4)
                                                    --------  --------  --------
Accumulated deficit:
  Beginning balance...............................   (14,995)       --        --
  Net loss (post-recapitalization)................   (16,876)  (14,995)       --
                                                    --------  --------  --------
  Ending balance..................................   (31,871)  (14,995)       --
                                                    --------  --------  --------
Total stockholders' equity (deficit)..............  $ (1,337) $  2,493  $ 13,185
                                                    --------  --------  --------
                                                    --------  --------  --------
</TABLE>


  The accompanying notes are an integral part of these financial statements.


                                       42

<PAGE>

                                  VYSIS, INC.
                 (AN INDIRECT SUBSIDIARY OF AMOCO CORPORATION)
                                        
                      CONSOLIDATED STATEMENT OF CASH FLOWS
                                        
                                 (IN THOUSANDS)


<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                                    ----------------------------
                                                      1997      1996      1995
                                                    --------  --------  --------
<S>                                                 <C>       <C>       <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss........................................  $(16,876) $(18,181) $(17,701)
  Reconciliation of net loss to net cash used in
    operating activities:
    Depreciation and amortization.................     2,885     1,805     2,065
    Loss (gain) on disposition of assets..........       (30)     (246)      305
    Donation of marketable securities.............        --       515        --
    Stock compensation............................       161       123        --
    Changes in assets and liabilities:
      Accounts receivable.........................    (2,054)     (943)     (480)
      Inventories.................................      (473)     (804)      204
      Other current assets........................      (336)     (467)      353
      Accounts payable and accrued liabilities....     1,380       770     3,568
      Deferred revenue............................       129        57       350
                                                    --------  --------  --------
    Net cash used in operating activities.........   (15,214)  (17,371)  (11,336)
                                                    --------  --------  --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of property and equipment.............      (280)     (509)   (2,873)
  Acquisition of Techgen..........................        --      (295)       --
  Proceeds from sale of property and equipment....        30     6,778        --
  Proceeds from sale of investment................        --       314        --
  Increase in other assets........................      (557)   (1,548)     (485)
                                                    --------  --------  --------
    Net cash provided by (used in) investing
     activities...................................      (807)    4,740    (3,358)
                                                    --------  --------  --------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Capital contributions--Amoco, net...............        --     2,315    11,882
  Increase in notes payable--Amoco................    15,697     9,649        --
  Expenses funded by Amoco........................       956       452     3,058
  Proceeds from exercise of stock options.........         8        --        --
                                                    --------  --------  --------
    Net cash provided by financing activities.....    16,661    12,416    14,940
Effect of exchange rate changes on cash...........       (19)       16        (9)
                                                    --------  --------  --------
Net increase (decrease) in cash...................       621      (199)      237
Cash at beginning of period.......................        48       247        10
                                                    --------  --------  --------
Cash at end of period.............................  $    669  $     48  $    247
                                                    --------  --------  --------
                                                    --------  --------  --------
</TABLE>


  The accompanying notes are an integral part of these financial statements.





                                       43

<PAGE>

                                    VYSIS, INC.
                   (An indirect subsidiary of Amoco Corporation)
                                          
                     NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



NOTE 1--ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES:

ORGANIZATION AND BUSINESS

     Vysis, Inc. ("Vysis" or the "Company") was incorporated in Delaware in 
1991. The Company's principal stockholder is Amoco Technology Company 
("ATC"), which is a wholly owned subsidiary of Amoco Corporation ("Amoco"). 
In 1991, ATC acquired from Genzyme its remaining interest in Gene-Trak 
Systems, a joint venture focused on infectious disease diagnostics originally 
formed by Amoco and Integrated Genetics in 1986, and established Gene-Trak, 
Inc., a Delaware corporation, which at that time was named Gene-Trak Systems 
Corporation. In March 1994, ATC contributed all of its infectious disease 
business related assets and the stock of Gene-Trak, Inc. to the Company. 
Also, in March 1994, ATC contributed to the Company all of its genetic 
disease business related assets, including the stock of Vysis, Inc. (an 
Illinois corporation), which at that time was named Imagenetics Incorporated. 
In January 1995, ATC contributed to the Company all of the assets of its 
bioinformatics software activities. All assets contributed by Amoco were 
recorded by the Company at Amoco's net book value at the date of transfer. 
All references to Amoco shall mean Amoco Corporation, an Indiana corporation, 
and its wholly owned subsidiary Amoco Technology Company, a Delaware 
corporation. 

     Vysis is a genomic disease management company focused on developing and 
marketing clinical products to assess the structure and function of the human 
genome. The Company's DNA probe technologies provide the clinician with an 
enhanced ability to manage disease by assessing the human genome at all 
levels, including the ability to determine the presence, absence, number and 
structure of chromosomes, individual genes, and specific base pair mutations 
within genes. The Company currently markets its genomic testing products for 
research and clinical use and markets its food testing products for 
commercial use. 

BASIS OF PRESENTATION

     The accompanying consolidated financial statements include those assets, 
liabilities, revenues and expenses directly attributable to the Company's 
operations. The Company's organization, capitalization and outstanding shares 
prior to the 1996 recapitalization, as described in Note 8, are not 
indicative of the Company's future structure. Consequently, the accumulated 
deficit, net loss and equity contributions are reflected as a single line 
item "Capital Contribution - Amoco" in the accompanying consolidated 
financial statements prior to February 29, 1996. 

PRINCIPLES OF CONSOLIDATION

     The consolidated financial statements include the accounts of the 
Company and its wholly owned subsidiaries. All significant intercompany 
accounts and transactions have been eliminated. 

USE OF ESTIMATES

     The preparation of financial statements in conformity with generally 
accepted accounting principles requires management to make estimates and 
assumptions that affect certain reported amounts. Actual results may differ 
from those estimates. 


                                       44


<PAGE>


REVENUE RECOGNITION

     Product sales revenue is recognized upon shipment of products to 
customers. No rights to return products exist other than under normal 
warranty provisions. Grant and license fee revenue is recognized as earned 
pursuant to the related agreement and is not subject to repayment. Payments 
received under these agreements prior to the completion of the related work 
are recorded as deferred revenue. Revenue on equipment maintenance contracts 
is deferred and recognized ratably over the period of the contract, generally 
one year. 

RESEARCH AND DEVELOPMENT EXPENDITURES

     Research and development costs are expensed as incurred and include 
amounts relating to grant revenues. 

LOSS PER SHARE

     In 1997, the Company adopted SFAS No. 128, "Earnings Per Share," which 
requires presentation of both basic and diluted earnings per share.  Loss per 
share data presented in 1996 and 1995 assumes that the shares issued in 
connection with the 1996 recapitalization (see Note 8 for further discussion) 
were outstanding throughout 1996 and 1995.  No reconciliation is presented of 
basic and diluted loss per share as no potentially dilutive Common Stock 
equivalents existed prior to the 1996 recapitalization, and for periods after 
the recapitalization Common Stock equivalents outstanding are antidilutive to 
the net loss per share.

INVENTORIES

     Inventories are stated at the lower of cost or market. Cost is 
determined on the first-in, first-out method. Inventories are reassessed 
periodically to determine whether any potential impairment exists. Provision 
for potentially obsolete or slow moving inventory is made based on 
management's analysis of inventory levels and anticipated future sales. 

CAPITALIZED SOFTWARE COSTS

     Software development costs incurred subsequent to the establishment of 
technological feasibility are capitalized in accordance with Statement of 
Financial Accounting Standards ("SFAS") No. 86, "Accounting for the Cost of 
Computer Software to be Sold, Leased, or Otherwise Marketed." Amortization of 
capitalized software development costs is the greater of the amount computed 
using (a) the ratio of current revenues to the total of current and 
anticipated future revenues or (b) the straight-line method over the 
estimated economic life of the product. 

PROPERTY AND EQUIPMENT

     Property and equipment are recorded at cost. Depreciation is provided on 
the straight-line basis over the following expected useful lives: 

<TABLE>
<CAPTION>
          <S>                                     <C>
          Buildings and improvements              10 to 45 years
          Furniture, fixtures and equipment       3 to 7 years
</TABLE>

Leasehold improvements are depreciated over the shorter of their useful life 
or lease term. Significant improvements are capitalized and repairs and 
maintenance charges are expensed as incurred.





                                       45

<PAGE>

INTANGIBLE ASSETS

     Intangible assets include capitalized license fees, which are carried at 
cost less accumulated amortization, and goodwill. Amortization expense is 
calculated on a straight-line basis over the estimated economic useful lives 
of the assets, ranging from one to seventeen years. The Company periodically 
reviews the recoverability of these assets based primarily upon estimated 
future cash flows. 

FINANCIAL INSTRUMENTS

     The carrying value of accounts receivable, accounts payable and the note 
payable to Amoco approximates their fair value. Financial instruments that 
potentially subject the Company to concentrations of credit risk consist 
principally of accounts receivable. Such credit risk is generally limited due 
to the large number of organizations comprising the Company's customer base 
and their dispersion across different geographic locations. The Company 
maintains an allowance for potentially doubtful accounts based upon specific 
circumstances, historical trends and other information. 

FOREIGN CURRENCY TRANSLATION

     The functional currency for the Company's foreign subsidiaries is the 
local currency. Translation from the applicable foreign currency to U.S. 
dollars is performed for assets and liabilities using exchange rates in 
effect at the balance sheet date and for the statement of operations using 
the average exchange rates in effect during the period. Gains or losses from 
such translations are accumulated in a separate component of stockholders' 
equity. Gains and losses resulting from foreign currency transactions are 
included in the results of operations and have not been significant. 

STOCK-BASED COMPENSATION

     Effective January 1, 1996, the Company adopted the disclosure 
requirements of SFAS No. 123 "Accounting for Stock-Based Compensation." As 
permitted, the Company continues to recognize stock-based compensation costs 
under the intrinsic value based method of accounting as prescribed by 
Accounting Principles Board Opinion No. 25. The pro forma effects of applying 
the provisions of SFAS No. 123 are shown in Note 9 to the consolidated 
financial statements. 

INCOME TAXES

     Amoco has utilized the tax benefits associated with the Company's net 
operating losses for the years ended December 31, 1997, 1996 and 1995, 
pursuant to the terms of a tax sharing agreement (see Note 3). 

RECENT ACCOUNTING PRONOUNCEMENTS

     In June 1997, the Financial Accounting Standards Board issued SFAS No. 
131 "Disclosures about Segments of an Enterprise and Related Information." 
SFAS No. 131 establishes new standards for reporting information about 
operating segments in interim and annual financial statements. SFAS No. 131 
will be effective for the Company in 1998. The Company is currently 
evaluating the impact, if any, this statement will have on disclosures in its 
consolidated financial statements. 

NOTE 2--INITIAL PUBLIC OFFERING

     During October 1997, the Board of Directors authorized the Company to 
proceed with an initial public offering of the Company's Common Stock (the 
"Offering").  The Company completed the Offering on February 10, 1998 and 
issued 3 million shares of Common Stock, resulting in net cash proceeds of 
approximately $32.3 million.  In connection with the Offering, 6,200,000 and 
553,126 shares of Series A and Series B Convertible Preferred Stock, 
respectively, automatically converted into 4,525,547 and 403,741 shares of 
Common Stock, respectively.  In addition, concurrent with the consummation of 
the Offering, the Company converted $8.1 million of the Note

                                       46

<PAGE>

Payable-Amoco into 675,000 shares of Common Stock and repaid the balance of 
the note.  Upon completion of the Offering, the Company had approximately 9.7 
million shares of Common Stock issued and outstanding.

NOTE 3--RELATED PARTY TRANSACTIONS:

     The Company has in the past received certain legal services, research 
and development support, and administrative support from Amoco and has paid 
for such services and support on an actual usage or pro rata basis. The 
amounts of these costs included in the consolidated statement of operations 
were as follows (in thousands): 

<TABLE>
<CAPTION>
                                               YEAR ENDED DECEMBER 31,
                                               ------------------------
                                                 1997    1996     1995
                                               ------   ------   ------
    <S>                                        <C>      <C>      <C>
    Research and development. . . . . . . .     $ --    $ --     $2,099
    Selling, general and administrative . .      182      304       959
                                              -------   -------  ------
                                                 $182     $304   $3,058
                                              -------   -------  ------
                                               ------   ------   ------
</TABLE>

     Management of the Company believes these costs are reasonable under the 
circumstances. These charges may not be indicative of the actual costs that 
would have been incurred if the Company had operated independently. In 
addition, during 1997 Amoco paid on behalf of the Company certain expenses 
aggregating $138,000. The Company also received cash advances, to meet its 
working capital requirements, and other capital assets from Amoco.  For the 
year ended December 31, 1997 such amounts consisted of advances of 
$15,697,000 under a note payable to Amoco.  During 1996, such amounts 
consisted of contributed capital of $2,315,000 and advances of $10,137,000 
under a note payable to Amoco.  During 1995, all such amounts aggregated 
$15,384,000 and were recorded as contributed capital.

     The Company has entered into a tax sharing agreement with Amoco, 
effective January 1, 1996, which provides for a capital contribution to the 
Company in an amount approximating the tax effect of including the Company's 
results of operations in Amoco's consolidated federal income tax return. 
Under this agreement, $7,451,000 and $5,031,000 were recorded as contributed 
capital and a related reduction of the note payable to Amoco during 1997 and 
1996, respectively.  The Company did not record any tax benefit associated 
with its losses for the year ended December 31, 1995.  Under the terms of the 
tax sharing agreement, the Company will continue to receive through February 
10, 1998, a capital contribution approximating the amounts realized by Amoco, 
which relate to deductions or losses to be generated by the Company.  
Pursuant to the terms of the agreement, state income taxes have not been 
material. 

     The note payable to Amoco of $9,202,000 at December 31, 1997 included 
accrued interest expense of $636,000, bears interest at 7.5 percent and is 
due on the earlier of the date the Company completes the Offering or December 
31, 1998 (see Note 2).  The note payable to Amoco of $5,106,000 at December 
31, 1996 included accrued interest of $148,000. The note bore interest at 7.5 
percent and was converted into 553,126 shares of Series B Preferred Stock in 
September 1997 (see Notes 2 and 8).

NOTE 4--COMPOSITION OF BALANCE SHEET COMPONENTS:

     Accounts receivable consisted of the following (in thousands): 

<TABLE>
<CAPTION>
                                                      DECEMBER 31,
                                                  -------------------
                                                    1997        1996
                                                  --------    --------
     <S>                                          <C>         <C>
     Accounts receivable . . . . . . . . .  . .   $4,826      $2,957
     Less:  allowance for doubtful accounts . .     (197)       (156)
                                                  --------    --------
                                                  $4,629      $2,801
                                                  --------    --------
                                                  --------    --------
</TABLE>


                                       47

<PAGE>

     Inventories consisted of the following (in thousands): 

<TABLE>
<CAPTION>
                                                       DECEMBER 31,
                                                   -------------------
                                                     1997        1996
                                                   --------    --------
     <S>                                           <C>         <C>
     Raw materials and supplies . . . . . . .      $1,198       $  997
     Finished goods . . . . . . . . . . . . .       1,535        1,393
                                                   --------    --------
                                                   $2,733       $2,390
                                                   --------    --------
                                                   --------    --------
</TABLE>

       Property and equipment consisted of the following (in thousands): 

<TABLE>
<CAPTION>
                                                      DECEMBER 31,
                                                  -------------------
                                                    1997        1996
                                                  --------    --------
      <S>                                         <C>         <C>
      Leasehold improvements . . . . . . . . .    $ 2,382      $ 2,382
      Furniture, fixtures and equipment. . . .      8,713        8,191
                                                  --------    --------
                                                   11,095       10,573
                                                  --------    --------
      Less:  accumulated depreciation. . . . .     (6,449)      (5,016)
                                                  --------    --------
                                                  $ 4,646      $ 5,557
                                                  --------    --------
                                                  --------    --------
</TABLE>

       Other assets consisted of the following (in thousands): 

<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                                        -------------------
                                                          1997        1996
                                                        --------    --------
       <S>                                              <C>         <C>
       License fees (net of accumulated amortization
        of $1,509 and $309 in 1997 and 1996,
        respectively) . . . . . . . . . . . . . . . . .  $1,192      $2,535
       Software development costs (net of accumulated
        amortization of $143 and $40 in 1997 and 1996,
        respectively) . . . . . . . . . . . . . .           989         535
                                                        --------    --------
                                                         $2,181      $3,070
                                                        --------    --------
                                                        --------    --------
</TABLE>

     Accounts payable and accrued liabilities consisted of the following (in
thousands): 

<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                                        -------------------
                                                          1997        1996
                                                        --------    --------
       <S>                                              <C>          <C>
       Trade accounts payable . . . . . . . . . .        $3,017      $3,546
       Accrued rent . . . . . . . . . . . . . . .         1,107       1,141
       Employee related costs . . . . . . . . . .         1,084         743
       Accrued professional fees. . . . . . . . .         1,534         504
       Other taxes payable. . . . . . . . . . . .           356         423
       Other. . . . . . . . . . . . . . . . . . .         1,440         752
                                                        --------    --------
                                                         $8,538      $7,109
                                                        --------    --------
                                                        --------    --------
</TABLE>

NOTE 5--INVESTMENT:

     In 1994, the Company acquired 1,400 shares of preferred stock in Genome 
Systems, Inc. for cash consideration of $200,000. In 1996, Genome Systems, 
Inc. was acquired by Incyte Pharmaceuticals, Inc. ("Incyte") and the 
Company's investment was exchanged for restricted common stock of Incyte, a 
publicly held company. During 1996, a portion of this investment with a cost 
of $100,000 was sold and a gain of $214,000 was included in the Company's 
results of operations. As of December 31, 1996, the investment balance 
consisted of Incyte restricted common stock and is therefore recorded at cost 
of $100,000.  During 1997, the restriction expired and, as a result, the 
investment balance of $677,000 at December 31, 1997 represents the market 
value of the available-for-sale Incyte common stock.

                                       48

<PAGE>

The unrealized gain of $577,000 has been included as a component of 
stockholders' equity (deficit).

NOTE 6--INCOME TAXES:

     During the years ended December 31, 1997, 1996 and 1995, the Company's
results of operations were included in the consolidated income tax returns of
Amoco, accordingly, the Company's domestic net operating losses have been
utilized by Amoco in its consolidated income tax returns and are not available
to offset the Company's future taxable income. 

     The approximate income tax effect of each temporary difference giving rise
to deferred tax assets and liabilities is as follows (in thousands): 

<TABLE>
<CAPTION>
                                                            DECEMBER 31,
                                                        -------------------
                                                          1997        1996
                                                        --------    --------
     <S>                                                <C>          <C>
     Deferred tax assets:
        Patents . . . . . . . . . . . . . . . . . .      $  233      $  255
        Accrued rent. . . . . . . . . . . . . . . .         443         457
        Foreign net operating loss carryforwards. .         423         374
        Accrued vacation. . . . . . . . . . . . . .         137         130
        Inventory reserve . . . . . . . . . . . . .         122         125
        Other . . . . . . . . . . . . . . . . . . .         142          95
                                                        --------    --------
     Total deferred tax assets. . . . . . . . . . .       1,500       1,436
     Valuation allowance. . . . . . . . . . . . . .        (817)       (790)
                                                        --------    --------
     Net deferred tax assets. . . . . . . . . . . .         683         646
     Deferred tax liabilities:
        Accumulated depreciation, software 
            development costs and license fees. . .        (683)       (646)
                                                        --------    --------
     Net deferred tax assets. . . . . . . . . . . .      $   --      $   --
                                                        --------    --------
                                                        --------    --------
</TABLE>

     The Company had foreign net operating loss carryforwards of $871,000 at 
December 31, 1997, of which approximately $273,000 will expire at varying 
dates through 2001 and the remainder of which may be carried forward 
indefinitely. 

     A full valuation allowance has been provided for all deferred tax assets
(net of liabilities) as management does not consider realization of such amounts
more likely than not. On an unaudited pro forma separate income tax return
basis, assuming the Company was not included in the consolidated income tax
returns of Amoco, no tax provision or benefit would have been recorded in the
consolidated financial statements due to the ongoing losses of the Company. 

NOTE 7--DEVELOPMENT AND LICENSE AGREEMENTS:

     The Company has entered into various license agreements pursuant to which
it has been granted exclusive and non-exclusive licenses to certain patented
technologies. The agreements require the Company to pay royalties ranging from
0.5 to 8.0 percent on net sales of specified products, with certain agreements
requiring minimum royalties due each year. As additional consideration for
certain of the licenses, the Company is obligated to fund certain research of
the licensors. Future minimum amounts due for such licenses, minimum royalties
and research funding are as follows (in thousands): 





                                       49

<PAGE>

<TABLE>
<CAPTION>
              YEAR ENDING
              DECEMBER 31,
              ------------
              <S>                                       <C>
              1998 . . . . . . . . . . . . . . . . . .    $  645
              1999 . . . . . . . . . . . . . . . . . .     1,835
              2000 . . . . . . . . . . . . . . . . . .     1,800
              2001 . . . . . . . . . . . . . . . . . .       600
              2002 . . . . . . . . . . . . . . . . . .       300
                                                        ----------
                                                          $5,180
                                                        ----------
                                                        ----------
</TABLE>

NOTE 8--CAPITALIZATION:

     On February 29, 1996, pursuant to a recapitalization, the Company issued 
6,200,000 shares of its Series A Convertible Preferred Stock, par value 
$0.001 per share, and 1,058,394 shares of its Common Stock, par value $0.001 
per share, to Amoco as consideration for the cumulative investment by Amoco 
in the Company, which was $12,318,000. The investment by Amoco in the Company 
included assets contributed by Amoco which were recorded at Amoco's net book 
value at the date of transfer. In connection with the recapitalization, 
$6,000 and $1,000 was assigned to the par value of the Series A Convertible 
Preferred Stock and Common Stock, respectively, while the remaining 
$12,311,000 was credited to additional paid-in capital. 

     In September 1997, the Company converted $5,106,000 of the note payable 
due to Amoco into 553,126 shares of its Series B Convertible Preferred Stock, 
par value $0.001 per share. 

     The holder of Series A and Series B Convertible Preferred Stock is 
entitled to receive cumulative dividends at an annual rate of 6 percent of 
the Series A and Series B liquidation value (initially $8.0645 and $9.23 per 
share, respectively), when and if declared by the Board of Directors. In the 
event of a liquidation, the holder of the Series A and Series B Convertible 
Preferred Stock shall receive the sum of $8.0645 and $9.23 per share, 
respectively, and any declared but unpaid dividends. Additionally, the holder 
of the Series A and Series B Convertible Preferred Stock is entitled to share 
in any dividends paid on Common Stock. 

     The holder of the Series A and Series B Convertible Preferred Stock is 
entitled to vote together with the holders of Common Stock, as a single class 
in all matters. The Series A and Series B holder is entitled to votes equal 
to the number of common shares into which such holder's shares are 
convertible.  Each share of Series A and Series B Convertible Preferred Stock 
shall be automatically converted into .73 share of Common Stock upon the 
closing of an initial public offering of the Company's Common Stock resulting 
in aggregate net proceeds of not less than $10 million (see Note 2).

     On November 20, 1997 the Company effected a 1 for 1.37 reverse stock 
split of its Common Stock. All share and per share amounts in the 
consolidated financial statements and notes thereto have been adjusted 
retroactively to reflect this stock split.

NOTE 9--EMPLOYEE BENEFIT PLANS:

     In February 1996, the Company adopted the 1996 Stock Incentive Plan (the 
"1996 Plan"). A total of 985,402 shares of Common Stock have been authorized 
for issuance under the 1996 Plan, subject to anti-dilution and other 
adjustments. In general, under the 1996 Plan, incentive or nonqualified stock 
options may be granted at a price not less than 100 percent of the estimated 
fair value of the Common Stock on the date of grant, as determined by the 
Compensation Committee of the Board of Directors. Options generally vest over 
4 years and expire within 10 years from the date of grant. 




                                       50

<PAGE>

     Option activity under the 1996 Plan is summarized below:

<TABLE>
<CAPTION>
                                                      NUMBER OF     WEIGHTED
                                                        SHARES    AVERAGE PRICE
                                                      ---------   -------------
    <S>                                               <C>         <C>
       Granted . . . . . . . . . . . . . . . . . . .    878,994      $0.58
       Exercised . . . . . . . . . . . . . . . . . .         --         --
       Surrendered or terminated . . . . . . . . . .     21,642      $0.60
                                                      ---------
       Balance at December 31, 1996. . . . . . . . .    857,352      $0.58
       Granted . . . . . . . . . . . . . . . . . . .    162,007      $3.59
       Exercised . . . . . . . . . . . . . . . . . .     13,576      $0.53
       Surrendered or terminated . . . . . . . . . .     54,064      $0.60
                                                      ---------
       Balance at December 31, 1997. . . . . . . . .    951,719      $1.08

    Options exercisable at December 31, 1997 . . . .    402,262      $0.56
    Options available for future grant at
         December 31, 1997 . . . . . . . . . . . . . .   20,107
    Weighted-average fair value of options granted
         during the year ended December 31, 1996 . . .    $0.34
    Weighted-average fair value of options granted
         during the year ended December 31, 1997 . . .    $2.69
    Weighted-average fair value of options granted
         below estimated fair value during the
         year ended December 31, 1997. . . . . . . . .    $3.54
</TABLE>


     During 1997, the Company issued options to employees to purchase 78,249 
shares of Common Stock at an exercise price of $2.74 per share, exercisable 
through 2007. The Company recorded deferred compensation of $277,000 in 
connection with these options based upon differences between the estimated 
fair value of the underlying stock and the exercise price of the related 
options. During 1996, the Company issued options to consultants to purchase 
44,162 shares of Common Stock at an exercise price of $0.53 per share, 
exercisable through 2006. The Company recorded deferred compensation of 
$213,000 in connection with these options, based upon the difference between 
the estimated fair value of the services received and the exercise price of 
the options granted. The Company recognized $161,000 and $123,000 as stock 
compensation expense during the years ended December 31, 1997 and 1996, 
respectively.

     The following summarizes information about stock options outstanding at
December 31, 1997: 

<TABLE>
<CAPTION>
                   OPTIONS OUTSTANDING         OPTIONS EXERCISABLE
                 ------------------------    -----------------------
                               WEIGHTED
                                AVERAGE      WEIGHTED
     RANGE OF                  REMAINING     AVERAGE
     EXERCISE     NUMBER      CONTRACTUAL    EXERCISE       NUMBER
      PRICES    OUTSTANDING      LIFE         PRICE      EXERCISABLE
     --------   -----------   -----------    ---------   -----------
     <S>        <C>           <C>            <C>         <C>
      $0.53       753,382        8.2          $0.53        387,804
       1.34        37,211        8.6           1.34         14,458
       2.74       127,549        9.4           2.74            --
       6.85        33,577        9.7           6.85            --
                -----------                              -----------
                  951,719                                  402,262
                -----------                              -----------
                -----------                              -----------
</TABLE>

     The fair value of each option was estimated on the date of grant using the
Black-Scholes option pricing model. The principal determinants of option pricing
are: the estimated fair value of the Company's Common Stock 

                                       51

<PAGE>

at the date of grant, expected volatility, risk-free interest rate, expected 
option lives and dividend yields. Weighted average assumptions employed by 
the Company were as follows: 

<TABLE>
<CAPTION>
                                              YEAR ENDED DECEMBER 31,
                                              -----------------------
                                                1997           1996
                                              --------       --------
       <S>                                    <C>            <C>
       Expected volatility . . . . . . . . .    47.5%          50.3%
       Risk free interest rate . . . . . . .     6.4%           6.2%
       Expected option life (years). . . . .       7              7
       Dividend yield. . . . . . . . . . . .       0              0
</TABLE>

     The Company applies Accounting Principles Board Opinion No. 25 in 
accounting for its fixed stock option plan and, accordingly, has not 
recognized compensation cost in the accompanying consolidated statement of 
operations for options granted and exercisable at their estimated fair value 
on the grant date. Had compensation cost been recognized based on fair value 
as of the grant dates as defined in SFAS No. 123, the Company's net loss 
would have increased by approximately $100,000 and $57,000, or $0.09 and 
$0.05 per share basic and diluted, for the years ended December 31, 1997 and 
1996, respectively. 

     The Company also maintains the Vysis, Inc. Savings and Investment Plan 
(the "Savings Plan"), as amended, which allows for participant contributions 
pursuant to Section 401(k) of the Internal Revenue Code. Substantially all 
the Company's U.S. employees are eligible to participate in the Savings Plan 
and may contribute up to 17 percent of their eligible compensation to the 
Savings Plan. The Company made contributions to the Savings Plan of $187,000, 
$164,000 and $210,000 in 1997, 1996 and 1995, respectively.

NOTE 10--SEGMENT AND GEOGRAPHIC INFORMATION:

     The Company operates in one business segment. Substantially all revenues 
result from the sale of genomic testing products and related instrumentation 
and the receipt of grant and other revenue. All significant intercompany 
revenues and expenses are eliminated in the presentation of revenues and net 
loss. Certain geographic information is as follows (in thousands): 

<TABLE>
<CAPTION>
                                            YEAR ENDED DECEMBER 31,
                                    -----------------------------------
                                       1997       1996           1995
                                    --------    --------      ---------
    <S>                             <C>         <C>           <C>
    Revenues:
       United States. . . . . . .   $ 10,286    $  8,655       $  5,488
       Europe . . . . . . . . . .      7,947       4,583          1,729
                                    --------    --------      ---------
        Total . . . . . . . . . .   $ 18,233    $ 13,238       $  7,217
                                    --------    --------      ---------
                                    --------    --------      ---------

    Net loss:
       United States. . . . . . .   $(16,828)   $(18,094)      $(17,334)
       Europe . . . . . . . . . .        (48)        (87)          (367)
                                    --------    --------      ---------
        Total . . . . . . . . . .   $(16,876)   $(18,181)      $(17,701)
                                    --------    --------      ---------
                                    --------    --------      ---------

<CAPTION>
                                                   DECEMBER 31,
                                    -----------------------------------
                                       1997       1996           1995
                                    --------    --------      ---------
    <S>                             <C>         <C>           <C>
    Assets:
       United States. . . . . . .   $ 11,958    $ 12,166      $  17,155
       Europe . . . . . . . . . .      4,982       2,949          2,012
                                    --------    --------      ---------
        Total . . . . . . . . . .   $ 16,940    $ 15,115      $  19,167
                                    --------    --------      ---------
                                    --------    --------      ---------
</TABLE>

     Export sales from U.S. operations amounted to approximately $1,422,000,
$694,000 and $547,000 for the years ended December 31, 1997, 1996 and 1995,
respectively, and consisted of sales principally to customers in the Far East. 
There were no sales to individual customers that exceeded 10 percent of total
revenues for any year.

                                       52

<PAGE>

NOTE 11--LEASE OBLIGATIONS:

     The Company operates in leased facilities and also leases certain
manufacturing and other equipment. These leases generally require the Company to
pay taxes, maintenance, insurance and certain other operating costs of the
leased property. Most of the Company's leases contain renewal clauses. 

     Future minimum lease payments under non-cancelable operating leases are as
follows (in thousands):

<TABLE>
<CAPTION>
                  YEAR ENDING
                  DECEMBER 31,
                  ------------
                  <S>                             <C>
                  1998. . . . . . . . . . . . .   $  935
                  1999. . . . . . . . . . . . .      741
                  2000. . . . . . . . . . . . .      681
                  2001. . . . . . . . . . . . .      604
                  2002. . . . . . . . . . . . .      687
                  Thereafter. . . . . . . . . .    1,301
                                                 --------
                                                  $4,949
                                                 --------
                                                 --------
</TABLE>

     Rental expense totaled $669,000, $606,000 and $695,000 in 1997, 1996 and
1995, respectively.

NOTE 12--ACQUISITION:

     On April 3, 1996, the Company acquired all of the outstanding common 
stock of TechGen International Sarl ("TechGen") for $295,000. TechGen is a 
French distributor of chemical, biological, health and hygiene products and 
equipment. The acquisition has been accounted for under the purchase method 
of accounting. Accordingly, the cash paid of $295,000 and liabilities assumed 
of $711,000 were allocated to the tangible assets acquired. The excess of the 
purchase price over the estimated fair value of net assets acquired of 
$457,000 has been assigned to goodwill and is being amortized using the 
straight-line method over a five year period. 

     The following unaudited pro forma financial information presents the 
combined results of operations of the Company and TechGen as if the 
acquisition had occurred at the beginning of each fiscal year. The pro forma 
information is based on historical results of operations and does not 
necessarily reflect the actual results that would have occurred, nor is it 
necessarily indicative of future results of operations of the combined 
enterprises (in thousands): 

<TABLE>
<CAPTION>
                                           YEAR ENDED DECEMBER 31,
                                           -----------------------
                                             1996          1995
                                           ---------    ----------
         <S>                               <C>          <C>
         Revenues. . . . . . . . . . . .   $  13,285      $ 8,549
         Net loss. . . . . . . . . . . .   $ (18,230)    $(17,796)
         Loss per share. . . . . . . . .   $  (17.22)     $(16.81)
</TABLE>

NOTE 13--COMMITMENTS AND CONTINGENCIES:

     The Company is an exclusive licensee of certain technology. The Company 
and the licensor of the technology are plaintiffs in a patent infringement 
suit filed in September 1995 against one of the Company's competitors. The 
Company and the licensor share the legal costs of this matter equally. In 
August 1997, the court ruled in favor of the Company and its licensor in 
several aspects of this matter. The trial of the remaining issues has been 
scheduled for April 1998. An unfavorable outcome for the Company is 
considered neither probable nor remote by management. The Company does not 
believe that loss of this lawsuit would have a material adverse impact on the 
results of operations or the Company's financial position as set forth in the 
accompanying consolidated financial statements. 

                                       53

<PAGE>

     The Company and Amoco are defendants in a law suit pending in the U.S. 
District Court in California alleging infringement of certain patents. The 
suit has been stayed pending the outcome of another suit brought against the 
plaintiff, challenging the plaintiff's claim to sole ownership to the patents 
at issue in the first lawsuit. Pursuant to a separate agreement between Amoco 
and the plaintiff in the latter lawsuit (the "Plaintiff"), the Company 
reimburses the legal costs incurred by the Plaintiff in that suit. In return, 
the Company receives contingent rights to acquire an exclusive license with 
right to sublicense under such rights as the Plaintiff may obtain in the 
patents. The Company has agreed with the Plaintiff to grant sub-licenses at 
commercially fair and reasonable terms should it acquire the exclusive 
license. The latter suit was bifurcated into two phases. On December 16, 
1997, upon completion of the first phase of the trial, the jury determined 
that the claims before it were barred as untimely.  The court has not yet 
entered the jury verdict as a final judgment of the court.  The Company 
understands that both parties are also disputing whether the jury verdict 
applied to all of the Plaintiff's claims.  The court held a hearing on this 
issue in late February 1998, but has not decided this dispute.  Although the 
Company believes that it has meritorious defenses in the first suit, there 
can be no assurance that the Company will ultimately prevail. An unfavorable 
outcome for the Company is considered neither probable nor remote by 
management. An estimate of a possible loss or range of a possible loss cannot 
currently be made. However, an adverse determination against the Company, 
which may include a finding of willful infringement and the awarding of 
plaintiff's attorney's fees, could have a material adverse effect on the 
Company's financial position and results of operations. 

     In October 1997, the Company entered into an Asset Purchase Agreement 
(the "Agreement") to purchase certain patents and other intellectual 
property. The Agreement calls for Vysis to pay the seller $250,000 in cash 
and issue 80,291 shares of its Common Stock concurrent with the closing of 
the transaction, which is expected to occur in June 1998. 

NOTE 14--SUPPLEMENTAL CASH FLOW INFORMATION:

     Amoco contributed property and equipment aggregating $36,000 and 
$444,000 to the Company in 1996 and 1995, respectively, and did not make any 
such contributions during 1997.  These amounts were reflected by the Company 
as a capital contribution from Amoco and recorded at Amoco's net book value.  
Certain other non-cash transactions with Amoco are described in Note 3.

                                       54

<PAGE>

                                                                    SCHEDULE II
                                        
                                  VYSIS, INC.
                                        
                       VALUATION AND QUALIFYING ACCOUNTS
              FOR THE YEARS ENDED DECEMBER 31, 1997, 1996 AND 1995
                                 (IN THOUSANDS)


<TABLE>
<CAPTION>
                                     BALANCE AT                         BALANCE AT
         DESCRIPTION OF              BEGINNING                            END OF
     ALLOWANCE AND RESERVES          OF PERIOD   ADDITIONS  DEDUCTIONS    PERIOD
- -----------------------------------  ----------  ---------  ----------  ----------
<S>                                  <C>         <C>        <C>         <C>
1997
Allowance for doubtful accounts . .    $156        $82         $41         $197
1996
Allowance for doubtful accounts . .    $220        $--         $64         $156
1995
Allowance for doubtful accounts . .    $160        $60         $--         $220
</TABLE>















                                       55

<PAGE>

                                   SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                       VYSIS, INC.



Date:  March 30, 1998                  By:  /s/ John L. Bishop
                                           -----------------------------------
                                           Name: John L. Bishop
                                           TITLE: PRESIDENT AND CHIEF 
                                           EXECUTIVE OFFICER

     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE
REGISTRANT AND IN THE CAPACITIES AND ON THE DATE INDICATED.

<TABLE>
<CAPTION>
         SIGNATURES                   TITLE (CAPACITY)               DATE
         ----------                   ----------------               ----
<S>                              <C>                              <C>


 /s/ John L. Bishop               President, Chief Executive
- ------------------------------     Officer and Director           March 30, 1998
       John L. Bishop              (Principal Executive Officer
                                   and Director)



 /s/ James J. Habschmidt          Vice President of Finance and
- ------------------------------     Chief Financial Officer        March 30, 1998
     James J. Habschmidt           (Principal Financial and
                                   Accounting Officer)


 /s/ William M. Bartlett
- ------------------------------   Director                         March 30, 1998
    William M. Bartlett


 /s/ Robert C. Carr
- ------------------------------   Director                         March 30, 1998
       Robert C. Carr


 /s/ Kenneth L. Melmon
- ------------------------------   Director                         March 30, 1998
      Kenneth L. Melmon


 /s/ Walter R. Quanstrom
- ------------------------------   Director                         March 30, 1998
    Walter R. Quanstrom
</TABLE>


                                       56

<PAGE>

<TABLE>
<CAPTION>
         SIGNATURES                   TITLE (CAPACITY)               DATE
         ----------                   ----------------               ----
<S>                              <C>                              <C>

 /s/ Frank J. Sroka
- ------------------------------   Director                         March 30, 1998
     Frank J. Sroka


 /s/ Richard C. Williams
- ------------------------------   Director                         March 30, 1998
     Richard C. Williams
</TABLE>














                                       57

<PAGE>

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                      DESCRIPTION OF DOCUMENT 
- ----------    -----------------------------------------------------------------
<S>           <C>
    3.1.1*    Certificate of Incorporation of Vysis, Inc. (formerly Framingham
              Development Company) filed April 18, 1991.

    3.1.2*    Certificate of Amendment of Certificate of Incorporation filed
              March 30, 1994.

    3.1.3*    Certificate of Merger filed February 1, 1996.

    3.1.4*    Certificate of Amendment of Certificate of Incorporation filed
              February 29, 1996.

    3.1.5*    Certificate of Correction of Certificate of Amendment filed
              July 22, 1996.

    3.1.6*    Certificate of Amendment of Certificate of Incorporation filed
              September 16, 1997.

    3.1.7*    Certificate of Designations of Series B Preferred Stock, filed
              September 17, 1997.

    3.1.8*    Certificate of Amendment of Certificate of Incorporation filed
              November 21, 1997.

    3.2*      Bylaws of Vysis, Inc.

    4.1*      Form of Common Stock Certificate.

(1) 10.1*     Vysis, Inc. 1996 Stock Incentive Plan.

    10.2*     Industrial Building Lease between American National Bank and
              Trust Company of Chicago and Vysis, Inc. dated November 29, 1994.

    10.3*     License Agreement for Chromosome Analysis Technology with
              Chromosome-Specific Probes between ATC and The Regents of The
              University of California dated August 15, 1989, as amended
              October 6, 1989; July 1, 1991; April 15, 1992; June 1, 1994;
              June 6, 1994; June 28, 1994; July 1, 1994; September 1, 1994.

    10.4*     Exclusive License Agreement between The Regents of The University
              of California and Imagenetics for Inventions made in the field of
              Molecular Cytogenetics dated July 1, 1994.

    10.5*     Option Agreement between The Regents of The University of
              California and Imagenetics for Inventions made in the field of
              Molecular Cytogenetics dated July 1, 1994.

    10.6*     Exclusive Option Agreement between Vysis and the University of
              California for the Glass Chromosome.

    10.7*     Exclusive License Agreement between the Regents of the University
              of California and Vysis, Inc. for Molecular Cytogenetics Software
              dated June 1, 1995.

    10.8*     Exclusive License Agreement between the Regents of The University
              of California and ATC dated July 30, 1992, as amended,
              December 7, 1994.

    10.9*     License Agreement between The Trustees of Columbia University,
              The Salk Institute for Biological Studies and Gene-Trak Systems
              dated October 7, 1988, as amended June 15, 1996.
</TABLE>

                                       58


<PAGE>

<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER                      DESCRIPTION OF DOCUMENT 
- ----------    -----------------------------------------------------------------
<S>           <C>
    10.10*    Research and License Agreement between Gene-Trak Inc. and Public
              Health Research Institute dated July 14, 1994 and Letter re:
              Research and License Agreement dated July 18, 1994.

    10.11*    Exclusive Distributor Agreement between Vysis, Inc. and Fujisawa
              Pharmaceutical Co., Ltd. dated July 31, 1995.

(2) 10.12*    Sublicense Agreement between Ciba Corning Diagnostics Corp. and
              Vysis, Inc. dated May 24, 1996.

    10.13*    Software Development and Marketing Agreement between Digital
              Scientific Limited and Vysis, Inc. dated January 1, 1996.

    10.14*    Cooperation Agreement between the Company and Amoco Technology
              Company.

    10.15     Registration Rights Agreement between the Company and Amoco
              Technology Company.

    10.16*    Amended and Restated Tax Allocation Agreement between the Company
              and Amoco Technology Company.

    21.1*     Subsidiaries of Vysis, Inc.

    23.1      Consent of Independent Accountants.

    27.1      Financial Data Schedule.
</TABLE>
___________

*    Previously filed under the corresponding exhibit number in the Company's 
     S-1 Registration Statement No. 333-38109 and incorporated herein by
     reference.

(1)  Management contract or compensatory plan or arrangement.

(2)  Confidential information contained in this Agreement has been omitted.

                                      59

<PAGE>

                            REGISTRATION RIGHTS AGREEMENT


     THIS AGREEMENT, made as of February 5, 1998, is by and between Vysis, 
Inc., a Delaware corporation (the "Company"), and Amoco Technology Company, a 
Delaware corporation (the "Stockholder").

     This Agreement is made in connection with the registration for sale to 
the public of shares of common stock, $.001 par value, of the Company (the 
"Common Stock") pursuant to a registration statement on Form S-1 and any 
amendments thereto (the "Registration Statement") originally filed with the 
Securities and Exchange Commission (the "Commission") on October 17, 1997 
(File No. 333-38109) (the "Initial Public Offering").

     Prior to the Initial Public Offering, the Stockholder owned 
approximately 100% of the issued and outstanding shares of common stock of 
the Company and upon consummation of the Initial Public Offering the 
Stockholder will own approximately 63% of the outstanding Common Stock.

     THE PARTIES HERETO AGREE AS FOLLOWS:

     1.   DEFINITIONS.  As used in this Agreement, the following capitalized 
terms shall have the following respective meanings:

          AFFILIATE -- Of any Person is any Person which, directly or 
indirectly, controls or is controlled by or is under common control with, 
such Person.  A Person shall be deemed to be "controlled by" any other Person 
if such other Person possesses, directly or indirectly, power (i) to vote 10% 
or more of the securities having ordinary voting power for the election of 
managing general partners or directors (or Persons holding equivalent 
positions) of such Person (or, at the time extraordinary voting powers are 
available, to vote 10% or more of the securities having extraordinary voting 
power); or (ii) to direct or cause the direction of the management and 
policies of such Person whether by contract or otherwise.

          EXCHANGE ACT - The Securities Exchange Act of 1934, as amended, or 
any similar federal statute then in effect, and a reference to a particular 
section thereof shall be deemed to include a reference to the comparable 
section, if any, of any such similar federal statute.

          HOLDER - The Stockholder and any Person to whom it has assigned 
rights hereunder as permitted by Section 10(c).

          PERSON - Any individual, partnership, joint venture, corporation, 
trust, unincorporated organization or government or any department or agency 
thereof.

<PAGE>

          REGISTRABLE SECURITIES - The Common Stock owned by the Stockholder 
on the date hereof, Common Stock issuable to the Stockholder upon conversion 
of the Company's outstanding shares of Series A Preferred Stock or Series B 
Preferred Stock and any Common Stock or other securities which may be issued 
or distributed in respect thereof by way of or in connection with a stock 
dividend or stock split or other distribution, recapitalization, 
reclassification, combination of shares, merger, consolidation or other 
reorganization.  As to any particular Registrable Securities, such 
Registrable Securities shall cease to be Registrable Securities when they 
cease to be owned by a Holder.

          SECURITIES ACT - The Securities Act of 1933, as amended, or any 
similar federal statute then in effect, and a reference to a particular 
section thereof shall be deemed to include a reference to the comparable 
section, if any, of any such similar federal statute.

          SHELF REGISTRATION STATEMENT - A registration statement on Form S-3 
filed pursuant to Rule 415 under the Securities Act.
     
     2.(a) DEMAND REGISTRATION.  In the event that following 180 days after 
the effective date of the Registration Statement any Holder or Holders desire 
to sell shares of Registrable Securities owned by such Holder or Holders then 
upon the written request of any Holder or Holders requesting that the Company 
effect the registration under the Securities Act of all or part of such 
Holder's or Holders' Registrable Securities and specifying the intended 
method of disposition thereof, but subject to the limitations set forth 
herein, the Company will promptly give written notice of such requested 
registration to all other Holders of Registrable Securities, and the Company 
shall file with the Commission as promptly as practicable after sending such 
notice, and use its best efforts to cause to become effective, a registration 
statement under the Securities Act registering the offering and sale of:

          (i) the Registrable Securities which the Company has been so requested
     to register by such Holder or Holders; and

          (ii) all other Registrable Securities which the Company has been
     requested to register by any other Holder thereof by written request given
     to the Company within 15 days after the giving of such written notice by
     the Company (which request shall specify the intended method of disposition
     of such Registrable Securities),

all to the extent necessary to permit the disposition (in accordance with the
intended method thereof as aforesaid) of the 

                                 -2-
<PAGE>

Registrable Securities so to be registered; PROVIDED, that the Company shall 
not be obligated to file a registration statement relating to any 
registration request under this Section 2(a) (A) unless the aggregate 
requests by the Holder or Holders for such registration cover not less than 
an aggregate of 1,000,000 shares (adjusted for any stock splits, reverse 
stock splits or combination of shares) or (B) with respect to more than one 
such registration per calendar year; provided that a request may cover fewer 
than 1,000,000 shares (but not less than 500,000 shares) if the total number 
of shares of Registrable Securities then outstanding is less than 1,000,000.

     A request for registration under this Section 2(a) shall not be counted 
for purposes of the foregoing limitation (i) unless a registration statement 
has become effective and has been kept continuously effective for the period 
required under Section 4(b), (ii) if after it has become effective, use of 
such registration statement is suspended by any stop order, injunction or 
other order or requirement of the Commission or other governmental agency or 
court, (iii) if no Registrable Securities are sold within the period during 
which the registration statement has been kept continuously effective as 
required under Section 4(b).

     A Holder may, in connection with a request for registration under this 
Section 2(a), specify that the Registrable Securities are to be sold on a 
delayed or continuous basis, in which case the Company shall file a Shelf 
Registration Statement with respect thereto; provided, that each of the 
following conditions has been satisfied: (i) the Company is eligible to file 
a registration statement on Form S-3, (ii) a period of six years has elapsed 
since the effective date of the Registration Statement  and (iii) the total 
number of Registrable Securities outstanding constitutes 30% or less of the 
total number of shares of Common Stock outstanding.

     (b) PRIORITY IN REQUESTED REGISTRATIONS.  If a requested registration 
pursuant to this Section 2 involves an underwritten offering and the managing 
underwriter advises the Company in writing that, in its opinion, the number 
of securities requested to be included in such registration (including 
securities of the Company which are not Registrable Securities) exceeds the 
number which can be sold in such offering, the Company will include in such 
registration only the Registrable Securities requested to be included in such 
registration.  In the event that the number of Registrable Securities 
requested to be included in such registration exceeds the number which, in 
the opinion of such managing underwriter, can be sold, the number of such 
shall be allocated first to the Stockholder and its Affiliates, and then  pro 
rata among all other requesting Holders on the basis of the 

                                  -3-
<PAGE>

relative number of shares of Registrable Securities originally requested to 
be included by each such Holder.  

     (c) LIMITATION ON REGISTRATION RIGHTS.

          (i) If a request for registration pursuant to Section 2(a) hereof is
     made within 30 days prior to the conclusion of the Company's then current
     fiscal year, or within 40 days after the end of a fiscal year, the Company
     shall not be required to file a registration statement until such time as
     the Company receives its audited financial statements for such fiscal year.

          (ii) The Company shall be entitled to postpone for a reasonable period
     of time (not to exceed 90 days, which may not thereafter be extended
     without the mutual agreement of the Company and the Holder or Holders
     requesting registration) the filing of any registration statement otherwise
     required to be prepared and filed by it pursuant to Section 2(a) hereof if,
     at the time it receives a request for such registration, (w) the Company is
     conducting or about to conduct an offering of any class of its securities
     and the Company is advised by the investment banker or financial advisor
     engaged by the Company to advise the Company thereon that such offering
     would be affected adversely by the registration so demanded and the Company
     shall have furnished to the Holder or Holders of Registrable Securities
     requesting such registration an Officers' Certificate to that effect,
     (x) the Company is in possession of material information that has not been
     disclosed to the public and the Company deems it advisable not to disclose
     such information in the registration statement, (y) the Company is engaged
     in any active program for repurchase of its Common Stock or (z) the board
     of directors of the Company shall determine in good faith that such
     offering will interfere with a pending or contemplated financing, merger,
     acquisition, sale of assets, recapitalization or other similar corporate
     action of the Company and the Company shall have furnished to the Holder or
     Holders of Registrable Securities requesting such registration an Officers'
     Certificate to that effect.  The Company may only exercise its right to
     postpone the filing of registration statement under this Section 2(c)(ii)
     once in any calendar year.  In the event of the exercise by the Company of
     such postponement right, it shall furnish the requesting Holders with an
     estimate as to when the circumstances permitting the Company to postpone
     such filing shall cease to exist and thereafter give the Holders prompt
     notice of such cessation.  After such period of postponement the Company
     shall effect such registration as promptly as practicable without further
     request from the Holder or Holders of Registrable Securities, unless such
     request has been withdrawn.

                                      -4-
<PAGE>

          (iii) Except as otherwise provided herein, any request by a Holder or
     Holders for registration of Registrable Securities pursuant to Section 2(a)
     hereof, which is subsequently withdrawn prior to the registration statement
     becoming effective, shall not constitute a registration statement for
     purposes of determining the number of registrations to which the Holder of
     such Registrable Securities is entitled pursuant to Section 2(a); PROVIDED,
     HOWEVER, that the Holder of such Registrable Securities shall reimburse the
     Company for all expenses incurred, including, without limitation,
     reasonable fees and expenses of the Company's attorneys, accountants and
     investment bankers, in connection with the preparation and filing, if
     filed, of such registration statement, unless such withdrawal is the result
     of a postponement by the Company under Section 2(c)(ii).

     (d) In connection with any request for registration under this Section 2 
involving an underwritten offering, the requesting Holders shall have the 
right to select the underwriter or underwriters with the consent of the 
Company, which consent shall not be unreasonably withheld.

     3.(a) INCIDENTAL REGISTRATION.  If the Company shall at any time propose 
to file a registration statement under the Securities Act for an offering of 
Common Stock of the Company for cash (other than an offering relating to (i) 
a business combination that is to be filed on Form S-4 under the Securities 
Act (or any successor form thereto) or (ii) an employee benefit plan or (iii) 
securities of the Company convertible into Common Stock where no separate 
consideration is received by the Company for such Common Stock), the Company 
shall provide prompt written notice of such proposal to all Holders of 
Registrable Securities of its intention to do so and of such Holders' rights 
under this Section 3 and shall use its reasonable efforts to include such 
number or amount of Registrable Securities in such registration statement, 
which the Company has been so requested to register by the Holders thereof, 
which request shall be made to the Company within 10 business days after the 
Holder receives notice from the Company of such proposed registration; 
PROVIDED, that (i) if, at any time after giving written notice of its 
intention to register any securities and prior to the effective date of the 
registration statement filed in connection with such registration, the 
Company shall determine for any reason not to register such securities, the 
Company may, at its election, give written notice of such determination to 
each Holder of Registrable Securities and, thereupon, shall be relieved of 
its obligation to register any Registrable Securities in connection with such 
registration 

                                  -5-
<PAGE>

(but not from its obligation to pay the registration expenses referred to in 
Section 5 incurred in connection therewith), and (ii) if such registration 
involves an underwritten offering, all Holders of Registrable Securities 
requesting to be included in the Company's registration must sell their 
Registrable Securities to the underwriters selected by the Company on the 
same terms and conditions as apply to the Company, with such differences, 
including any with respect to indemnification and liability insurance, as may 
be customary or appropriate in combined primary and secondary offerings.  The 
Holders shall have the right to revoke their election to have their shares 
included in such registration at any time prior to the filing of the 
registration statement.

     (b) PRIORITY IN INCIDENTAL REGISTRATIONS.  If a registration pursuant to 
this Section 3 involves an underwritten offering and the managing underwriter 
advises the Company in writing that, in its opinion, the number of securities 
to be included in such registration exceeds the number which can be sold in 
such offering, so as to be likely to have a significant adverse effect on 
such offering as contemplated by the Company (including the price, timing or 
distribution of which the Company proposes to sell such securities), then the 
Company will include in such registration (i) first, 100% of the securities 
the Company proposes to sell, (ii) second, to the extent of the number of 
Registrable Securities requested to be included in such registration which, 
in the opinion of such managing underwriter, can be sold without having the 
significant adverse effect referred to above, the number of Registrable 
Securities which the Holders have requested to be included in such 
registration, such amount to be allocated first to the Stockholder and its 
Affiliates, and then pro rata among all requesting Holders on the basis of 
the relative number of shares of Registrable Securities initially requested 
to be included by each such Holder.  

     4. REGISTRATION PROCEDURES.  Whenever a Holder or Holders have requested 
that any Registrable Securities be registered pursuant to this Agreement, the 
Company will use its best efforts to effect the registration and the sale of 
such Registrable Securities in accordance with the intended method of 
disposition thereof, and pursuant thereto the Company will as expeditiously 
as possible:

          (a) prepare and file with the Commission a registration statement with
     respect to such Registrable Securities (which shall be effected within 30
     days of a request in the case of a registration under Section 2(a)) and use
     its best efforts to cause such registration statement to become effective
     (provided that before filing a registration statement or prospectus or any
     amendments or supplements thereto, the Company will furnish to the counsel

                                       -6-
<PAGE>

     selected by the Holders of a majority of the Registrable Securities covered
     by such registration statement copies of all such documents proposed to be
     filed, which documents shall be subject to review of such counsel;

          (b) prepare and file with the Commission such amendments and
     supplements to such registration statement and the prospectus used in
     connection therewith as may be necessary to keep such registration
     statement effective for such period as is necessary to complete the
     disposition of all securities covered by such registration statement during
     such period in accordance with the intended methods of disposition by the
     seller or sellers thereof set forth in such registration statement;
     PROVIDED, HOWEVER, that such period shall not exceed 90 days unless the
     registration statement is a Shelf Registration Statement;

          (c) furnish to each seller of Registrable Securities such number of
     copies of such registration statement, each amendment and supplement
     thereto, the prospectus included in such registration statement (including
     each preliminary prospectus) and such other documents as such seller may
     reasonably request in order to facilitate the disposition of the
     Registrable Securities owned by such seller;

          (d) use its best efforts to register or qualify such Registrable
     Securities under such other securities or blue sky laws of such
     jurisdictions as any seller reasonably requests and do any and all other
     acts and things that may be reasonably necessary or advisable to enable
     such seller to consummate the disposition in such jurisdictions of the
     Registrable Securities owned by such seller (provided that the Company will
     not be required to (i) qualify generally to do business in any jurisdiction
     where it would not otherwise be required to qualify but for this
     subparagraph, (ii) subject itself to taxation in any such jurisdiction or
     (iii) consent to general service of process in any such jurisdiction);

          (e) notify each seller of such Registrable Securities, at any time
     when a prospectus relating thereto is required to be delivered under the
     Securities Act,(i) of the occurrence of any event as a result of which the
     prospectus included in such registration statement contains an untrue
     statement of a material fact or omits any fact necessary to make the
     statements therein, in light of the circumstances under which made, not
     misleading, and at the request of any such seller, the Company will prepare
     a supplement or amendment to such prospectus so that, as thereafter
     delivered to the purchasers of such Registrable Securities, such prospectus
     will not contain an untrue statement of a 

                                    -7-
<PAGE>

     material fact or omit to state any fact necessary to make the statements 
     therein, in light of the circumstances under which made, not misleading; 
     or (ii) of the issuance by the Commission of any stop order suspending 
     the effectiveness of the registration statement or of any order 
     preventing or suspending the use of any preliminary prospectus, or of 
     the suspension of the qualification of the registration statement for 
     offering or sale in any jurisdiction, or of the institution or 
     threatening of any proceedings for any of such purposes; PROVIDED, 
     HOWEVER, that the Company shall not be required to notify a seller of 
     Registrable Securities of the occurrence of any event described in 
     clause (i) hereof that relates to a prospectus contained in a Shelf 
     Registration Statement unless within the 30 days prior thereto the 
     seller has given the Company notice of its intention to offer or sell 
     Registrable Securities pursuant to Section 5(e) below;

          (f) cause all such Registrable Securities to be listed on each
     securities exchange on which securities issued by the Company that are of
     the same class as the Registrable Securities are then listed;

          (g) provide a transfer agent and registrar for all such Registrable
     Securities not later than the effective date of such registration
     statement;

          (h) make available for inspection by any seller of Registrable
     Securities, any underwriter participating in any disposition pursuant to
     such registration statement and any attorney, accountant or other agent
     retained by any such seller or underwriter all financial and other records,
     pertinent corporate documents and properties of the Company, and cause the
     Company's officers, directors, employees and independent certified public
     accountants to supply all information reasonably requested by any such
     seller, underwriter, attorney, accountant or agent in connection with such
     registration statement;

          (i) use its best efforts to cause such Registrable Securities covered
     by such registration statement to be registered with or approved by such
     other governmental agencies or authorities as may be necessary to enable
     the sellers thereof to consummate the disposition of such Registrable
     Securities;

          (j) obtain a "cold comfort" letter from the Company's independent
     public accountants in customary form and covering such matters of the type
     customarily covered by "cold comfort" letters as the seller or sellers of a
     majority of the Registrable Securities being sold reasonably request;

                                      -8-

<PAGE>

          (k) if underwriters are engaged by the Company in connection with any
     registration referred to in this Agreement (such underwriters shall be
     reasonably satisfactory to the Holders of a majority of the Registrable
     Securities covered by such registration), the Company shall provide
     indemnification, representations, covenants, opinions and other assurance
     to the underwriters in form and substance reasonably satisfactory to such
     underwriters; and

          (l) enter into such customary agreements (including underwriting
     agreements in customary form) and take all such other actions as the
     Holders of a majority of the Registrable Securities being sold or the
     underwriters, if any, reasonably request in order to expedite or facilitate
     the disposition of such Registrable Securities.

          (m) obtain an opinion of outside counsel (or inside counsel if
     satisfactory to each underwriter) for the Company covering such matters of
     the type customarily covered in opinions of issuer's counsel as the seller
     or sellers of a majority of the Registrable Securities being sold
     reasonably request;

          (n) file the reports required by the Exchange Act for companies
     registered under such act and otherwise comply with all applicable rules
     and regulations of the Commission;

          (o) keep the sellers advised as to the initiation and progress of any
     demand or other registration; and

          (p) promptly deliver to the Holders copies of all public announcements
     made by the Company regarding disposition, acquisitions or other material
     transactions involving the Company.

     5. HOLDERS' OBLIGATIONS IN REGISTRATION.

          (a) Each Holder agrees, that, upon receipt of notice of an event
     described in Section 4(e) above, such Holders will immediately discontinue
     disposition of the Registrable Securities until such Holder's receipt of
     the copies of the supplemented or amended prospectus contemplated by
     Section 4(e) or until it is advised in writing by the Company that the use
     of the prospectus may be resumed, and has received copies of any additional
     or supplemental filings which are incorporated by reference in the
     prospectus.  If so directed by the Company, such Holder will, or will
     request the managing underwriter or agent, if 

                                   -9-
<PAGE>

     any, to deliver to the Company at the Company's expense all copies 
     (other than permanent file copies) then in such Holder's possession, of 
     the prospectus covering such Registrable Securities current at the time 
     of receipt of such notice.

          (b) In respect of a registration pursuant to this Agreement, each
     Holder of Registrable Securities covered by a registration statement shall
     advise the Company immediately if such Holder knows or becomes aware of any
     matter which such Holder believes may result in the inclusion in a
     prospectus contained in such registration statement of an untrue statement
     of a material fact or the omission of a material fact required to be stated
     therein or necessary to make the statements therein not misleading, and
     shall promptly notify the Company and assist the Company in preparation and
     filing with the Commission of any such amendments or supplements to said
     registration statement that may be necessary or appropriate to permit the
     prospectus included therein to be used under the Securities Act during the
     period during which the prospectus must be delivered in connection with the
     offering and sale of the Registrable Securities.

          (c) The Company may require each Holder of Registrable Securities as
     to which any registration is being effected to furnish to the Company such
     information regarding the distribution of such Registrable Securities and
     such other information relating to the Holder and its ownership of
     Registrable Securities as the Company may from time to time reasonably
     request and each Holder agrees to furnish the Company with such information
     and to cooperate with the Company as necessary to enable the Company to
     comply with the provisions of this Agreement.

          (d) In the case of any underwritten public offering by the Company of
     any shares of Common Stock or securities convertible into shares of Common
     Stock, each Holder of Registrable Securities agrees, if and to the extent
     requested in writing by the managing underwriter of such offering, not to
     effect any public sale or distribution of the Common Stock of the Company
     (except as part of such underwritten offering), during the period ending on
     the earlier of (i) 90 days after the effective date of the registration
     statement relating to such underwritten public offering and (ii) the date
     such sale or distribution is permitted by such managing underwriter.

          (e)In the event that a Shelf Registration Statement has been filed and
     declared effective with respect to any Registrable Securities, the Holder
     of such Registrable 

                                       -10-
<PAGE>

     Securities agrees to notify the Company of any proposed offer or sale 
     thereof at least two business days prior to the proposed offer or sale.  
     Such notice shall include such information relating to the Holder and 
     the proposed distribution of Registrable Securities by the Holder as 
     shall be required to be included in the prospectus, to the extent such 
     information has not already been included therein.  If within such two 
     business day period the Company advises the Holder furnishing such 
     notice that the Company is in possession of material information that 
     has not been disclosed to the public and the Company deems it advisable 
     not to disclose such information in the prospectus, then the Holder 
     furnishing such notice shall postpone the contemplated offering or sale 
     until the earlier to occur of (i) the date as of which the Company is no 
     longer in possession of such undisclosed material information (notice of 
     which the Company agrees to promptly furnish to the Holder)or (ii) the 
     date which is 30 days following the receipt by the Company of the notice 
     of proposed offer or sale.  A Holder furnishing a notice of proposed 
     offer or sale to the Company pursuant to this Section 5(e) shall 
     promptly notify the Company of the termination of such offering or 
     completion of such sale. 

     6. REGISTRATION EXPENSES.  All expenses incidental to the Company's
performance of or compliance with this Agreement, including, without limitation,
all registration and filing fees, fees and expenses of compliance with
securities or blue sky laws, printing expenses, messenger and delivery expenses,
and fees and disbursements of counsel for the Company and all independent
certified public accountants, underwriters (excluding discounts and commissions)
and other persons retained by the Company, including, without limitation, all
salaries and expenses of the Company's officers and employees performing legal
or accounting duties, the expense of any annual audit or quarterly review, the
expense of any liability insurance and the expenses and fees for listing the
securities to be registered on each securities exchange on which securities
issued by the Company that are of the same class as the Registrable Securities
are then listed will be borne by the Company, except that underwriting discounts
and commissions relating to the sale of Registrable Securities will be the
responsibility of each seller, and each seller shall be responsible for all fees
and disbursements of their own counsel.

     7. TERM.  This Agreement shall terminate at such time as the shares of
Registrable Securities owned by the Holders of Registrable Securities constitute
less than 5% of the issued and outstanding shares of Common Stock of the
Company.

                                      -11-

<PAGE>

     8. INDEMNIFICATION.  The provisions of this Section 8 shall be applicable
in respect of each registration pursuant to this Agreement.

     (a)  The Company shall hold harmless and indemnify each Holder of
Registrable Securities, any underwriter or agent participating in an offering
and their respective Affiliates (including any director, officer, employee,
agent or controlling Person of any of the foregoing), from and against all
losses, claims, damages, liabilities and expenses (including reasonable
attorneys' fees and expenses of investigation) incurred by such indemnified
party pursuant to any actual or threatened third-party action, suit, proceeding
or investigation (including reasonable attorneys' fees and expenses of
investigation) arising out of or based upon any untrue or alleged untrue
statement of material fact contained in any registration statement, any
amendment or supplement thereto, any prospectus or preliminary prospectus or any
omission or alleged omission to state therein a material fact required to be
stated therein or necessary to make the statements therein (in the case of a
prospectus, in light of the circumstances under which they were made) not
misleading, except insofar as the same arise out of or are based upon any such
untrue statement or omission based upon information with respect to such Holder
furnished in writing to the Company by such Holder expressly for use therein.

     (b) In connection with any registration statement in which a Holder of
Registrable Securities is participating, each such Holder will furnish to the
Company in writing such information, as the Company reasonably requests for use
in connection with any such registration statement or prospectus, and shall
severally and not jointly hold harmless and indemnify each other Holder of
Registrable Securities, any underwriter or agent participating in an offering,
the Company and its Affiliates (including any director, officer, employee,
agent, or controlling Person of each of the foregoing) from and against any
losses, claims, damages, liabilities and expenses (including reasonable
attorneys' fees and reasonable expenses of investigation) incurred by such
indemnified party pursuant to any actual or threatened third-party action, suit,
proceeding or investigation (including reasonable attorneys' fees and expenses
of investigation) arising out of or based upon any untrue or alleged untrue
statement of a material fact contained in any registration statement, any
amendment or supplement thereto, any prospectus or preliminary prospectus or any
omission or alleged omission of a material fact required to be stated therein or
necessary to make the statements therein (in case of a prospectus, in the light
of the circumstances under which they were made) not misleading, to the extent,
but only to the extent, that such untrue statement or omission is contained in
or failed to be contained in any information with respect to such Holder
furnished in writing by 

                                      -12-
<PAGE>

such Holder specifically for inclusion in any prospectus or registration 
statement; PROVIDED, HOWEVER, that the liability of such indemnifying party 
under this Section 8(b) shall be limited to the amount of net proceeds 
received by such indemnifying party in the offering giving rise to such 
liability.

     (c) The obligation of the Company under Section 8(a) and of the Holders 
of Registrable Securities under Section 8(b) to hold harmless and indemnify 
any underwriter or agent who participates in an offering or any of their 
respective Affiliates shall be conditioned on the underwriting or agency 
agreement containing an agreement by such underwriter or agent to hold 
harmless and indemnify each of the Company, the Holders of Registrable 
Securities participating in the offering, and their respective Affiliates 
(including any director, officer, employee, agent, or controlling Person of 
each of the foregoing) from and against any losses, claims, damages, 
liabilities and expenses (including reasonable attorneys' fees and expenses 
of investigation) incurred by such indemnified parties pursuant to any actual 
or threatened third-party action, suit, proceeding or investigation 
(including reasonable attorneys' fees and expenses of investigation) arising 
out of or based upon any untrue or alleged untrue statement of a material 
fact contained in any registration statement, any amendment or supplement 
thereof, any prospectus or preliminary prospectus or any omission or alleged 
omission of a material fact required to be stated therein or necessary to 
make the statements therein (in the case of a prospectus, in light of the 
circumstances under which they were made) not misleading, to the extent, but 
only to the extent, that such untrue statement or omission is contained or 
failed to be contained in any information with respect to such underwriter or 
agent furnished in writing by such underwriter or agent specifically for 
inclusion in any prospectus or registration statement.

     (d) The indemnity provisions in Sections 8(a) and 8(b) above are subject 
to the condition that, insofar as they relate to any untrue statement (or 
alleged untrue statement) or omission (or alleged omission) made in a 
preliminary prospectus or prospectus but eliminated or remedied in any 
amended prospectus, such indemnity provisions shall not inure to the benefit 
of any indemnified Person, if the Company has previously and in a timely 
manner delivered sufficient copies of such amended prospectus to such 
indemnified Person and if a copy of such amended prospectus required to be 
sent or given in accordance with any applicable law or regulation was not 
furnished by such indemnified Person to the person asserting the loss, 
liability, claim or damage.

     (e) Promptly after receipt by an indemnified party under this Section 8 
of any notice of the commencement of any lawsuit or other proceeding or 
investigation thereof, such indemnified party will, if a claim in respect 
thereof is to be made against 

                                    -13-
<PAGE>

the indemnifying parties hereunder, notify in writing the indemnifying 
parties of the commencement thereof; but the omission so to notify the 
indemnifying parties will not relieve the indemnifying parties from any 
liability which they may have to any indemnified party, unless such failure 
to notify is materially prejudicial to the indemnifying parties and 
materially increases their risk of loss.  In case any such lawsuit or other 
proceeding or investigation shall be brought against any indemnified party 
and such indemnified party shall notify the indemnifying parties of the 
commencement thereof, the indemnifying parties shall be entitled to 
participate therein and, unless in the opinion of counsel to the indemnified 
party a conflict of interest between such indemnified and indemnifying 
parties may exist in respect of such claim, to the extent that it shall wish, 
to assume the defense thereof, with counsel reasonably satisfactory to such 
indemnified party (who shall not, except with the consent of the indemnified 
party, be counsel to the indemnifying parties in such action).  In any such 
proceeding, any indemnified party shall have the right to retain its own 
counsel, but the fees and expenses of such counsel shall be at the expense of 
such indemnified party unless (i) the indemnifying party and the indemnified 
party shall have mutually agreed to the retention of such counsel,(ii) the 
indemnifying parties shall have failed to assume the defense of such action 
or proceeding or shall have failed to employ counsel reasonably satisfactory 
to such indemnified party in any action or proceeding; or (iii) the named 
parties (including any impleaded parties) to any such action or proceeding 
include both such indemnified party and the indemnifying parties, and such 
indemnified party shall have been advised by counsel in writing (with a copy 
to the indemnifying parties) that there may be one or more defenses available 
to such indemnified party or other indemnified parties or other indemnified 
parties which are different from or additional to those available to the 
indemnifying parties, then, such separate counsel shall be at the expense of 
the indemnifying parties and the indemnifying parties shall not have the 
right to assume the defense of such action or proceeding on behalf of such 
indemnified person.   After notice from the indemnifying parties to such 
indemnified party of their election so to assume the defense thereof, and 
provided that the exception in the foregoing sentence does not apply, the 
indemnifying parties shall not be liable to such indemnified party under 
these indemnification provisions for any legal expenses of other counsel or 
any other expenses, in each case subsequently incurred by such indemnified 
party, in connection with the defense thereof other than reasonable costs of 
investigation.  In any event, unless there exists a conflict among 
indemnified parties, the indemnifying parties shall not, in connection with 
any one such action or proceeding or separate but substantially similar or 
related actions or proceedings in the same jurisdiction arising out of the 
same general allegations or 

                                    -14-
<PAGE>

circumstances, be liable for the fees and expenses of more than one separate 
firm of attorneys at any time for all such indemnified parties.  No 
indemnifying party shall, without the prior written consent of the 
indemnified party, effect any settlement of any pending or threatened 
proceeding in respect of which any indemnified party is or could have been a 
party and indemnity could have been sought hereunder by such indemnified 
party unless such settlement includes an unconditional release of such 
indemnified party from all liability on claims that are the subject matter of 
such proceeding.  The indemnifying parties shall not be subject to any 
liability for any settlement made without their consent.

     (f)  In order to provide for the just and equitable contribution in 
circumstances under which the indemnity provided for in this Section 8 is for 
any reason held to be unenforceable by the indemnified parties though 
applicable in accordance with its terms, each applicable indemnifying party, 
in lieu of indemnifying such indemnified party, shall contribute to the 
amount paid or payable by such indemnified party as a result of any losses, 
claims, damages, liabilities or expenses of a nature contemplated by such 
indemnity in such proportion as is appropriate to reflect not only the 
relative benefits received by the indemnifying parties and the indemnified 
parties, but also to reflect the relative fault of the indemnifying and 
indemnified parties in connection with the statements or omissions which 
resulted in such losses, claims, damages, liabilities or expenses, as well as 
any other relevant equitable considerations; PROVIDED, HOWEVER, that no 
Person guilty of fraudulent misrepresentation (within the meaning of Section 
11(f) of the Securities Act) shall be entitled to contribution from any 
Person who was not guilty of such fraudulent misrepresentation.  
Notwithstanding anything in this subsection (f) to the contrary, no Holder 
shall be required to contribute any amount in excess of the net proceeds 
received by such Holder from the offering to which the losses, claims, 
damages, liabilities or expenses relate.

     The relative fault of such indemnifying and indemnified parties shall be 
determined by reference to, among other things, whether any untrue or alleged 
untrue statement of a material fact, or omission or alleged omission to state 
a material fact, has been made by, or relates to information supplied by, 
such indemnifying party or indemnified parties and the parties' relative 
intent, knowledge, access to information and opportunity to correct or 
prevent such statement or omission.  The amount paid or payable by a party as 
a result of the losses, claims, damages, liabilities and expenses referred to 
above shall be deemed to include any legal or other fees or expenses incurred 
by such party in connection with investigating or defending such claim

                                   -15-
<PAGE>

     9. PARTICIPATION IN UNDERWRITTEN REGISTRATIONS.  No person may 
participate in any registration hereunder that is underwritten unless such 
person (a) agrees to sell such person's securities on the basis provided in 
any underwriting arrangements approved by the person or persons entitled 
hereunder to approve such arrangements and (b) completes and executes all 
questionnaires, powers of attorney, indemnities, underwriting agreements and 
other documents required under the terms of such underwriting arrangements.

     10. MISCELLANEOUS.

     (a) REMEDIES.  Any person having rights under any provision of this 
Agreement will be entitled to enforce such rights specifically, to recover 
damages caused by reason of any breach of any provision of this Agreement and 
to exercise all other rights granted by law.

     (b) AMENDMENT AND WAIVERS.  The provisions of this Agreement may be 
amended and the Company may take any action herein prohibited, or omit to 
perform any act herein required to be performed by it, only if the Company 
has obtained the written consent of the Stockholder and its Affiliates (to 
the extent they are holders of Registrable Securities) and of Holders of at 
least 50% of the Registrable Securities held by any other Persons.

     (c) SUCCESSORS AND ASSIGNS.  All covenants and agreements in this 
Agreement by or on behalf of any of the parties hereto will bind and inure to 
the benefit of the respective successors and permitted assigns of the parties 
hereto whether so expressed or not.  A Holder shall be permitted to assign 
its rights hereunder to any Person to whom it transfers any Registrable 
Securities in a transaction not involving any public offering, provided that 
(A)(i) the number of Registrable Securities so transferred is not less than 
1,000,000 shares (adjusted for any stock split, reverse stock split or 
combination of shares) and (ii) the assignee agrees with the Company in 
writing to be bound by the provisions of this Agreement or (B) such Person is 
an Affiliate of Stockholder.

     (d) SEVERABILITY.  Whenever possible, each provision of this Agreement 
will be interpreted in such manner as to be effective and valid under 
applicable law, but if any provision of this Agreement is held to be 
prohibited by or invalid under applicable law, such provision will be 
ineffective only to the extent of such prohibition or invalidity, without 
invalidating the remainder of this Agreement.

     (e) COUNTERPARTS.  This Agreement may be executed in two or more 
counterparts, any one of which need not contain the signatures

                                 -16-
<PAGE>

of more than one party, but all such counterparts taken together will 
constitute one and the same Agreement.

     (f) DESCRIPTIVE HEADINGS.  The descriptive headings of this Agreement 
are inserted for convenience only and do not constitute a part of this 
Agreement.

     (g) GOVERNING LAW.  The General Corporation Law of Delaware will govern 
all issues concerning the relative rights of the Company and the Holders of 
Registrable Securities.  All other questions concerning the construction, 
validity and interpretation of this Agreement and the exhibits and schedules 
hereto will be governed by the internal law, and not the law of conflicts, of 
the State of Delaware.

     (h) NOTICES.  All notices, demands or other communications to be given 
or delivered under or by reason of the provisions of this Agreement will be 
in writing and will be deemed to have been given when delivered personally or 
two days after deposit in the mail, certified or registered mail, return 
receipt requested and postage prepaid, to the recipient.  Such notices, 
demands and other communication will be sent to the Stockholder initially as 
set forth below and to each other Holder of Registrable Securities at such 
Holder's address as it appears in the records of the Company (unless 
otherwise indicated by any such Holder to the Company in writing) and to the 
Company at its principal executive offices.

     For ATC:       3100 Woodcreek Drive
                    Downers Grove, Illinois  60515
                    Attn: President

with a copy to:     Amoco Corporation
                    200 East Randolph Drive
                    Chicago, Illinois  60601
                    Attn:  General Attorney --
                             Corporate Law Department





                                         -17-

<PAGE>


     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first written above.

                                             VYSIS, INC.


                                             By: /s/ John L. Bishop
                                                 -----------------------

                                                  Name: John L. Bishop
                                                        ----------------
                                                  Title: President & CEO
                                                         ---------------


                                              AMOCO TECHNOLOGY COMPANY


                                             By: /s/ Robert C. Carr
                                                 -----------------------

                                                  Name: Robert C. Carr
                                                        ----------------
                                                  Title: President
                                                         ---------------











                                       -18-



<PAGE>
                                                                   EXHIBIT 23.1

                      CONSENT OF INDEPENDENT ACCOUNTANTS

     We hereby consent to the incorporation by reference in the Registration 
Statement on Form S-8 (No. 333-47463) of Vysis, Inc. of our report dated 
March 13, 1998 appearing on page 39 of this Annual Report on Form 10-K.




PRICE WATERHOUSE LLP

Chicago, Illinois
March 26, 1998




<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                             669
<SECURITIES>                                         0
<RECEIVABLES>                                    4,826
<ALLOWANCES>                                     (197)
<INVENTORY>                                      2,733
<CURRENT-ASSETS>                                 9,139
<PP&E>                                          11,095
<DEPRECIATION>                                 (6,449)
<TOTAL-ASSETS>                                  16,940
<CURRENT-LIABILITIES>                           18,277
<BONDS>                                              0
                                0
                                          7
<COMMON>                                             1
<OTHER-SE>                                     (1,345)
<TOTAL-LIABILITY-AND-EQUITY>                    16,940
<SALES>                                         16,021
<TOTAL-REVENUES>                                18,233
<CGS>                                            7,287
<TOTAL-COSTS>                                   34,473
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                    82
<INTEREST-EXPENSE>                                 636
<INCOME-PRETAX>                               (16,876)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (16,876)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (16,876)
<EPS-PRIMARY>                                  (15.89)
<EPS-DILUTED>                                  (15.89)
        

</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission