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AHCPR Issues Colorectal Cancer Screening Evidence Report

Mar 1, 1997
Volume: 
6
Issue: 
3
  • Gastrointestinal Cancer

ROCKVILLE, Md--In the first report issued under its new Evidence-based
Practice Initiative, the Agency for Health Care Policy and Research (AHCPR)
has reaffirmed that early detection and treatment provide the primary means
of preventing death from colorectal cancer.

Among the conclusions of the report, based on a review of 3,500 citations
from the scientific literature (1966 to 1994):

  • Use of fecal occult blood testing followed by diagnostic evaluation
    and treatment for positive tests can cut colorectal cancer mortality by
    15% to 33%.
  • A 60-cm flexible sigmoidoscopy identifies nearly all cancers and polyps
    greater than 1 cm in diameter and 75% to 80% of small polyps.
  • Sigmoidoscopy screening can reduce colorectal cancer mortality risk
    by 59% to 80%.
  • Indirect evidence supports the use of double-contrast barium enema
    in screening for colorectal cancer.
  • While screening colonoscopy offers the potential to both identify and
    remove cancers and premalignant lesions, no studies completed to date show
    an associated mortality reduction.
  • Detecting and removing polyps reduces the incidence of colorectal cancer,
    and removing early cancers lowers mortality. Although both double-contrast
    barium enema and colonoscopy detect polyps and tumors, they have not been
    studied as screening tests.


    © 1997 by PRR, Inc. All rights reserved.

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