UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

September 9, 2003
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(Date of earliest event reported)


LABORATORY CORPORATION OF AMERICA HOLDINGS
- ------------------------------------------
(Exact name of registrant as specified in its charter)


   DELAWARE                1-11353             13-3757370
 --------------          -----------         --------------
(State or other         (Commission          (IRS Employer
jurisdiction of         File Number)         Identification
incorporation)                                   Number)


358 SOUTH MAIN STREET, BURLINGTON, NORTH CAROLINA 27215
- -------------------------------------------------------
(Address of principal executive offices)

336-229-1127
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(Registrant's telephone number, including area code)


ITEM 9. Regulation FD Disclosure

On September 9, 2003, Laboratory Corporation of America -Registered Trademark-
Holdings (LabCorp -Registered Trademark-)(NYSE:LH) and EXACT Sciences
Corporation (NASDAQ:EXAS) announced that PreGen-Plus-Trademark-, the DNA-based
stool test for the early detection of colorectal cancer, is now widely
available for use by physicians and patients to screen their patients for
colorectal cancer.  PreGen-Plus is an effective, easy-to-use and completely
non-invasive breakthrough screening option for the more than 80 million
Americans who should be screened for colorectal cancer.


Exhibits:
99.1  Press release of the Company dated September 9, 2003.


SIGNATURES

Pursuant to the requirements of the Securities and
Exchange Act of 1934, the registrant has duly caused
this report to be signed on its behalf by the
undersigned hereunto duly authorized.

          LABORATORY CORPORATION OF AMERICA HOLDINGS
          ------------------------------------------
                        (Registrant)

               By:/s/ BRADFORD T. SMITH
                  ----------------------------------
                      Bradford T. Smith
                      Executive Vice President
                      and Secretary


Date: September 9, 2003

EXACT Sciences                 Laboratory Corporation of America

For further information:

Media:
Peggy Kochenbach or Kate Jennings
Fleishman-Hillard
P: (617) 267-8223
E: kochenbp@fleishman.com
   jenningk@fleishman.com


Investor Relations and Corporate Communications:
Amy Hedison                      Pam Sherry
EXACT Sciences                   LabCorp
P:(508) 683-1252                 P:(336) 436-4855
E.:ahedison@exactsciences.com    E:sherryp@labcorp.com



PHYSICIANS AND PATIENTS NOW USING PREGEN-PLUS-TRADEMARK-
TO SCREEN FOR COLORECTAL CANCER

Breakthrough DNA-based colon cancer screening technology widely
available

MARLBOROUGH, MA and BURLINGTON, NC - (Sept. 9, 2003) - EXACT
Sciences Corporation (NASDAQ: EXAS) and Laboratory Corporation of
America-Registered Trademark- Holdings (LabCorp-Registered
Trademark-, NYSE: LH) today announced that PreGen-Plus-Trademark-
, the DNA-based stool test for the early detection of colorectal
cancer, is now widely available for use by physicians and
patients to screen their patients for colorectal cancer.  PreGen-
Plus is an effective, easy-to-use and completely non-invasive
breakthrough screening option for the more than 80 million
Americans who should be screened for colorectal cancer.  Based on
published studies to date, PreGen-Plus has demonstrated a point
sensitivity for colon cancer that is significantly greater than
that of fecal occult blood testing (FOBT), the only other non-
invasive colorectal cancer screening option available, and
comparable to other cancer screening tests such as the Pap smear
for cervical cancer.

"Colonoscopies and sigmoidoscopies are invasive and costly.  The
FOBT is unpopular because of the necessity to scrape samples off
your stool and it only tells you if blood is present, not
cancer," said Priscilla Savary, Executive Director of the
Colorectal Cancer Network.  "The DNA screening test is cost-
effective, non-invasive, and if it detects the earliest stages of
cancer it has a chance to increase survival rates from this
terrible disease."

PreGen-Plus: The Patient Perspective:
Patients agree that a non-invasive stool-based test will increase
compliance with their doctors' colorectal cancer screening
recommendations.  In data presented at the most recent Digestive
Disease Week conference, patients preferred PreGen-Plus over both
fecal occult blood testing and colonoscopy.

PreGen-Plus, which must be ordered by a physician, requires
patients to submit a single, whole stool for analysis by LabCorp.
Once the physician orders the test, the patient will receive
collection materials that he/she then uses to collect the single,
whole stool in the privacy of his/her home.  The patient then
returns the collection materials to LabCorp for testing.  Unlike
other screening methods, PreGen-Plus does not require any special
bowel preparation, stool handling and/or alteration in diet or
medications prior to testing.

"When my doctor told me to get a colonoscopy, I knew there were
other tests available that were less invasive," said Barbara
Wallace, a patient who approached her doctor about ordering
PreGen-Plus.  "I was very familiar with the fecal occult blood
test.  With that test, you take samples of the stool, you have to
watch your diet, you have to actually touch the stool and put it
on a piece of paper.  It gets to be very messy.  And quite
frankly, I was not interested in that."

PreGen-Plus: The Science:
PreGen-Plus is the only non-invasive DNA-based test available for
the detection of colorectal cancer and also is among the first
practical commercial applications of the human genome findings.
The companies believe this test will have widespread impact on
patient screening compliance and mortality.  In the laboratory,
the human DNA in the stool is extracted and then examined for
alterations associated with the presence of colorectal cancer.

PreGen-Plus consists of a panel of 23 individual tests, each
looking for the presence of DNA alterations in human DNA isolated
from stool.  These tests include analyzing the DNA for 21
specific mutations in the APC, K-ras and p53 genes, identifying a
marker for microsatellite instability known as Bat-26, and
identifying a novel marker known as DNA Integrity Assay (DIAr),
all of which have been shown to be associated with the presence
of colorectal cancer.

After analysis, the results are sent to the patient's physician
within approximately three weeks.  If a patient were to receive a
positive result from PreGen-Plus, indicating the likely presence
of colorectal cancer, he or she would be referred for additional
testing as medically appropriate, including colonoscopy.  With a
negative test result, it is recommended that patients continue
their regular screening program.

"The new stool DNA test is not as accurate as colonoscopy, but it
is more accurate than the only other purely non-invasive test,
which is testing the stool for blood, and it's a lot easier to
use," said Dr. Douglas Rex, Professor of Medicine at Indiana
University School of Medicine and Director of Endoscopy at
Indiana University Hospital. "It's an excellent option for people
who are not willing to undergo colonoscopy."

PreGen-Plus Represents Major Step Forward in Efforts to Raise
Screening Rates:
According to the American Cancer Society, survival rates for
colorectal cancer are greater than 90 percent if the disease is
detected early.  Unfortunately, however, despite the widespread
availability of screening tests for more than 20 years, screening
rates for colorectal cancer remain alarmingly low, and many
people attribute this to the fact that current methods are highly
invasive, inconvenient (given the necessary advance preparation)
or relatively inaccurate.   The availability of PreGen-Plus could
allow more people to be effectively screened for colorectal
cancer.

"We are pleased to be the exclusive laboratory provider of this
important new screening test for colon cancer," said Tom Mac
Mahon, LabCorp CEO and Chairman of the Board.  "Our mission at
LabCorp is to lead the industry in offering medically important
new tests, including those for cancer.  By bringing physicians
and their patients this valuable information, we hope to help
them make the best healthcare decisions possible."

"The introduction of PreGen-Plus is the culmination of many years
of dedication and hard work," said Don Hardison, President and
CEO of EXACT Sciences Corporation.  "It is truly gratifying to
know EXACT Sciences has developed a technology that has the
potential to save the lives of many people at risk for colorectal
cancer.  The introduction of PreGen-Plus brings us one step
closer to meeting our mission of eradicating mortality caused by
common cancers."

PreGen-Plus is available only through your doctor or other
licensed healthcare professional.  More information can be found
online at www.pregenplus.com or www.exactsciences.com.

About EXACT Sciences Corporation:
EXACT Sciences Corporation is a pioneer in applying genomics to
solve large clinical needs.  Its DNA-based assay, PreGen-Plus-
Trademark-, is intended for the early detection of colorectal
cancer in the average-risk population. The Company also has
developed PreGen-26-Trademark-, intended to detect colorectal
cancer in a high-risk group of patients. Colorectal cancer, which
is the most deadly cancer among non-smokers, is curable if
detected at an early stage.  Despite the availability of
colorectal cancer screening and diagnostic tests for more than 20
years, however, the rate of early detection of colorectal cancer
remains low, and deaths from colorectal cancer remain high.
EXACT Sciences believes its genomics-based technologies will
enable early detection of colorectal cancer so that more people
can be effectively treated.  Founded in 1995, EXACT Sciences is
based in Marlborough, Mass.  Detailed information on EXACT
Sciences and PreGen-Plus can be found on the World Wide Web at
www.exactsciences.com and www.pregenplus.com.

About LabCorp:
Laboratory Corporation of America-Registered Trademark- Holdings
is a pioneer in commercializing new diagnostic technologies and
the first in its industry to embrace genomic testing. With annual
revenues of $2.5 billion in 2002, over 24,000 employees
nationwide, and more than 200,000 clients, LabCorp offers over
4,000 clinical assays ranging from blood analyses to HIV and
genomic testing. LabCorp combines its expertise in innovative
clinical testing technology with its Centers of Excellence: The
Center for Molecular Biology and Pathology, in Research Triangle
Park, NC; National Genetics Institute, Inc. in Los Angeles, CA;
ViroMed Laboratories, Inc. based in Minneapolis, MN; The Center
for Esoteric Testing in Burlington, NC; and DIANON Systems, Inc.
based in Stratford, CT.  LabCorp clients include physicians,
government agencies, managed care organizations, hospitals,
clinical labs, and pharmaceutical companies. To learn more about
our growing organization, visit our Web site at: www.labcorp.com.


Certain statements made in this press release that are not based
on historical information are forward-looking statements which
are made pursuant to the safe harbor provisions of the Private
Securities Litigation Reform Act of 1995.  This press release
contains express or implied forward-looking statements relating
to, among other things, EXACT Sciences' and LabCorp's
expectations concerning their future revenues and expenses, their
business outlook and business momentum, their clinical trials,
the commercial launch of their technologies, and the
effectiveness and market acceptance of their technologies. These
statements are neither promises nor guarantees, but are subject
to a variety of risks and uncertainties, many of which are beyond
EXACT Sciences' and LabCorp's control, which could cause actual
results to differ materially from those contemplated in these
forward-looking statements.   Existing and prospective investors
are cautioned not to place undue reliance on these forward-
looking statements, which speak only as of the date hereof.
EXACT Sciences and LabCorp undertake no obligation to update or
revise the information contained in this press release, whether
as a result of new information, future events or circumstances or
otherwise.  For additional disclosure regarding these and other
risks faced by EXACT Sciences, see the disclosure contained in
EXACT Sciences' public filings with the Securities and Exchange
Commission including, without limitation, its most recent Annual
Report on Form 10-K and subsequent SEC filings and for additional
disclosure regarding these and other risks faced by LabCorp, see
the disclosure contained in LabCorp's public filings with the
Securities and Exchange Commission, including, without
limitation, its most recent Annual Report on Form 10-K and
subsequent SEC filings.