Abstract
PurposeTo review the CT findings and complications of small bowel diverticulitis (SBD) and discuss clinical presentations and outcomes. MethodsA text search of radiology reports within our health system for cases of small bowel diverticulitis yielded 95 cases. All cases were reviewed by an abdominal radiologist with equivocal cases reviewed by a second abdominal radiologist for consensus. Retrospective analysis of CT imaging findings was performed on 67 convincing cases of SBD. ResultsSmall bowel diverticulitis most often affected the jejunum (58%) and the duodenum (26%). The most common imaging feature was peridiverticular inflammation manifested by peridiverticular edema, diverticular wall thickening, bowel wall thickening, and fascial thickening. Edema was typically seen along the mesenteric border of the bowel with relative sparing of the anti-mesenteric side. When a prior CT was available, the affected diverticulum was identified in 95% of cases. Fecalized content within the affected diverticulum was observed in 51% of cases. Perforation (6%) and abscess (6%) were the most common complications. ConclusionSmall bowel diverticulitis is an uncommon cause of abdominal pain which can mimic an array of abdominal pathologies, although the reported mortality rate of 40–50% may no longer be accurate. The “fecalized diverticulum” sign can be helpful in identifying the culprit diverticulum and aid diagnosing SBD. Findings of perforation and or abscess formation are critical as they may impact management.
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