Surgery Rectum 1139d426 Most common cause of per rectal bleeding is: A Diverticulosis B Hemorrhoids C Crohn's disease D Cancer Colon High-Yield Explanation Ans. (a) DiverticulosisRef: Sabiston Page 1151 Table* Most common cause of bleeding PR overall is diverticulosis* MC cause of Bleeding PR in children is Fissure in ano.