Cap Polyposis

An 18-year-old man presented with sensation of anal mass and repeated episodes of rectal bleeding for 6 months, which he initially attributed to hemorrhoids. The patient had no history of chronic constipation or other medical history. Physical examination was unremarkable, apart from a palpable mass on digital rectal examination. All laboratory investigations were negative including H. pylori. On colonoscopy, multiple rough and uneven protuberances, with an erythematous surface and a yellow-white coating, can be observed from the upper edge of the anal canal up to 8  cm above it (Fig. 1).

Source: Digestive and Liver Disease - July 14, 2023 Category: Gastroenterology Authors: Xu Wang, Yi Ding, Hua Li, Wei-Feng Huang Tags: Image of the Month Source Type: research