Snapshot A 65-year-old man with a long history of constipation presents with bright red blood per rectum for 1 day. He denies any straining, abdominal pain, diarrhea, or lightheadedness. He denies any recent trauma and family history is unremarkable. His last colonoscopy was about 12 years ago and patient reports he had some "blebs" in his colon. Physical exam was largely unremarkable and a rectal exam did not show any perianal fissures or hemorrhoids. Stool hemocult test is positive. (Diverticulitis) Introduction Overview login to view 7 more bullets Epidemiology login to view 14 more bullets Pathogenesis login to view 10 more bullets Associated conditions login to view 3 more bullets Presentation Diverticulosis login to view 9 more bullets Diverticulitis login to view 11 more bullets Imaging Colonoscopy login to view 4 more bullets Computed tomography (CT) with contrast login to view 3 more bullets Plain abdominal radiograph login to view 4 more bullets Studies CBC and iron studies for evaluation of anemia secondary to blood loss login to view 1 more bullet Urinalysis login to view 2 more bullets Differential Inflammatory bowel syndrome (IBD) login to view 2 more bullets Colon/rectal cancer login to view 2 more bullets Acute appendicitis login to view 2 more bullets Treatment Diverticulosis login to view 7 more bullets Diverticulitis login to view 11 more bullets Complications Anemia Bleeding/hemorrhage Exsanguination Abscess login to view 1 more bullet Bowel obstruction Diverticular fistula Perforation Peritonitis Shock