<prompt> Commonest site for ischemic colitis isHepatic flexureSplenic flexureDescending colonAscending colon  <response>: Ans is b ie. Splenic flexure Although splenic flexure is the most common site of ischemic colitis, any segment of colon may be affected. The rectum is relatively spared because of its rich collateral circulation. - Schwartz 9eOther Commonly asked Commonest SitesCrohns ds -Terminal ileumAmoebic colitis -Sigmoid colonTyphoid ulcer -Terminal ileumTuberculous ulcer -Terminal ileumUlcerative colitis -RectumColonic diverticula -Descending Sigmoid colonGall stone ileus -Terminal ileumVolvulus -Sigmoid colonPolyps in Peutz-Jeghers synd -JejunumPeptic ulcer -1st part of duodenumGastric ulcer -Lesser curvature Just beyond the junction of body antrumHirschsprung ds -RectumObstruction in meconium ileus -Distal ileumBleeding in angiodysplasia -Right colonColon Ca -Rectosigmoid more specifically rectum 