The Yield of Surveillance Colonoscopy by Adenoma History and Time to Examination

Paul F. Pinsky, Robert E. Schoen, Joel L. Weissfeld, Timothy Church, Lance A. Yokochi, V. Paul Doria-Rose, Philip Prorok

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Background & Aims: Surveillance colonoscopy is recommended for subjects with a history of adenomas but there is limited information on the yield of surveillance. Methods: A sample of subjects in the Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial with abnormal flexible sigmoidoscopy and follow-up colonoscopy were queried about subsequent surveillance colonoscopy over a 10-year period. Medical records were obtained to verify procedure dates and histologic findings. Subjects with advanced adenomas, nonadvanced adenoma, nonadenomatous polyps, and no polyps at baseline were included. Results: At the first surveillance, 10.5% had advanced adenoma and 37% had any adenoma in the advanced adenoma group (n = 1057), compared with rates of 6.8% and 32% (nonadvanced adenoma: n = 765), 4.9% and 22% (nonadenomatous polyps: n = 658), and 3.1% and 16% (no polyps: n = 127) (P < .0001, linear trend test). Mean (SD) time intervals (years) from baseline colonoscopy to first surveillance were 3.4 (2.0) for advanced adenoma, 4.3 (2.0) for nonadvanced adenoma, 4.5 (2.0) for nonadenomatous polyps, and 4.7 (2.0) for no polyps. There were no increasing (or decreasing) trends in the observed rate of advanced adenoma or any adenoma with time to the initial surveillance examination in any baseline group. Among subjects with a second surveillance examination, adenoma findings at both baseline and first surveillance influenced the rates of advanced adenoma and any adenoma at second surveillance. Conclusions: Subjects with baseline advanced adenomas are more likely to have recurrent advanced adenomas at initial surveillance. The lack of association between recurrence rates and time to surveillance suggests limitations in our understanding of the biology of adenoma development.

Original languageEnglish (US)
Pages (from-to)86-92
Number of pages7
JournalClinical Gastroenterology and Hepatology
Issue number1
StatePublished - Jan 2009

Bibliographical note

Funding Information:
The authors disclose the following: Supported in part by contracts from the National Cancer Institute.

Copyright 2009 Elsevier B.V., All rights reserved.

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