Colonoscopy surveillance after polypectomy may be extended beyond five years.

Area of Science:

• Gastroenterology
• Endoscopy
• Cancer Prevention

Background:

• Limited data exists on colonoscopy surveillance intervals exceeding five years.
• Understanding adenoma recurrence risk is crucial for optimizing post-polypectomy surveillance strategies.

Purpose of the Study:

• To identify factors predicting appropriate colonoscopy surveillance intervals greater than five years.
• To assess the risk of advanced adenoma recurrence after polyp removal.

Main Methods:

• Retrospective analysis of 399 patients undergoing follow-up colonoscopy 5-10 years after an index procedure.
• Multivariate logistic regression to identify predictors of adenoma detection on follow-up.

Main Results:

• Adenoma incidence was 29.1% and advanced adenoma incidence was 6% overall.
• Patients with nonadvanced adenomas had similar advanced adenoma risk at 5 vs. 6-10 years (5% vs. 6.2%).
• Patients with index advanced adenomas had the highest recurrence risk (26% at 5 years). Proximal polyp location predicted advanced adenoma occurrence.

Conclusions:

• Colonoscopy intervals can be extended beyond five years for patients with nonadvanced adenomas.
• A 5-10 year rescreening interval is supported for patients with negative index colonoscopies.
• Patients with index advanced adenomas require repeat colonoscopy within five years due to high recurrence risk.