Colorectal adenomas in the lynch syndromes. Results of a colonoscopy screening program

Stephen J. Lanspa, Henry T. Lynch, Thomas C. Smyrk, Patricia Strayhorn, Patrice Watson, Jane F. Lynch, Joseph X. Jenkins, Henry D. Appelman

Research output: Contribution to journalArticlepeer-review

91 Scopus citations


Forty-four asymptomatic putative Lynch syndrome patients participated in a colonoscopy screening program. There were 18 men and 26 women; mean age was 44 yr. Thirty percent of Lynch syndrome patients had at least one adenoma; 20% had multiple adenomas. In 18% of the patients, adenomas were discovered proximal to the splenic flexure. In a reference group of 88 age- and sex-matched patients, 11% had adenomas, 4% had multiple adenomas, and 1% had right-sided adenomas. Twenty-one Lynch syndrome patients had follow-up colonoscopies. Of 7 patients with adenomas on initial examinations, 6 had adenomas at follow-up. Of 14 patients with negative initial examination results, 3 had adenomas at follow-up. The prevalence of adenomas in the Lynch syndromes is greater than in an unselected reference group. The adenomas are more proximally located, corresponding to the site of cancer distribution in the Lynch syndromes. A high rate of synchronous and metachronous lesions is found. Our findings support the hypothesis that adenomatous changes are the premalignant lesion in the Lynch syndromes. We also found evidence of heterogeneity among Lynch syndrome families in adenoma incidence.

Original languageEnglish (US)
Pages (from-to)1117-1122
Number of pages6
Issue number5 PART 1
StatePublished - May 1990

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology


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