Follow-up Colonoscopy: When Should This Patient Return?

Is a surveillance interval of 1 year, 3 years, 5, or 10 years recommended?

A 50-year-old man of average risk undergoes a first-time screening colonoscopy. A sub-centimeter polyp was found in the ascending colon and was removed. Histology revealed a sessile serrated adenoma.  

When should a repeat colonoscopy be performed?