Snapshot A 65-year-old man presents to the emergency room for increased abdominal pain and distention. He has a history of diverticulosis and chronic constipation. He last had a bowel movement 1 week ago and has not had any flatus in the past day. He reports 2 episodes of vomiting at home. On physical exam, his abdomen is distended and there is diffuse tenderness to palpation. A CT of his abdomen and pelvis shows dilated loops of bowel and a suspicious mass at the transition point. The surgery team is consulted and he is prepped for surgical intervention. Introduction Overview login to view 3 more bullets EPIDEMIOLOGY Demographics login to view 1 more bullet Risk factors login to view 1 more bullet Etiology Volvulus Intussusception Colonic mass/malignancy Diverticular disease Fecal impaction Stricture Incarcerated hernia Pathogenesis login to view 4 more bullets Presentation History login to view 5 more bullets Symptoms login to view 3 more bullets Physical exam login to view 9 more bullets Imaging Abdominal radiographs login to view 8 more bullets Contrast radiography with enema login to view 4 more bullets Computed tomography (CT) of abdomen and pelvis with contrast login to view 8 more bullets Studies Serum labs login to view 6 more bullets Differential Small bowel obstruction login to view 2 more bullets Ogilvie syndrome login to view 2 more bullets Treatment Lifestyle login to view 6 more bullets Medical login to view 10 more bullets Surgical login to view 5 more bullets Complications Ischemic colitis Bowel perforation Prognosis Prognostic variable login to view 2 more bullets