Colonic Diverticulitis By Joel A Baum, MD, Icahn School of Medicine at Mount Sinai; Rafael Antonio Ching Companioni, MD, HCA Florida Gulf Coast Hospital Reviewed / Revised Oct 2022 View Patient Education Etiology Classification Symptoms and Signs Diagnosis Treatment Key Points More Information Segmental Colitis Associated With Diverticulosis (SCAD) Topic Resources Diverticulitis Diverticulitis (Granulation... Diverticulitis (CT Scan) Classification of Acute Complicat... Overview of Diverticulosis... Diverticulitis is inflammation with or without infection of a diverticulum, which can result in phlegmon of the bowel wall, peritonitis, perforation, fistula, or abscess.