Case Report

Invasive Cancer in a Diminutive Rectal Polyp Amidst Internal Hemorrhoids Detected by Rectal Retroflexion

A diminutive rectal polyp amidst internal hemorrhoids, detected by rectal retroflexion during colonoscopy, was shown to harbor invasive rectal adenocarcinoma by colonoscopic biopsy. Initially this lesion had appeared to be a relatively innocuous prominent anorectal mucosal fold and was recognized as a diminutive polyp only after careful rectal retroflexion during…