Giant colon diverticulum: clinical and imaging findings in 17 patients with emphasis on CT criteria.

PURPOSE: The purpose of the study was to review the clinical and radiologic features of giant colonic diverticulum (GCD). METHODS: Medical records of 17 patients with GCD on computed tomographic (CT) examination were reviewed. RESULTS: CT examination revealed the GCD in all patients as a predominantly gas-filled structure communicating with the adjacent colon. Thirteen patients showed a gas-filled structure on abdominal radiograph. The mean GCD diameter was 7 cm. Most diverticula were found in the sigmoid colon. Associated diverticulosis was present in 71% of patients. CONCLUSION: Our experience suggests that GCD can often be diagnosed on the basis of the characteristic radiographic and CT findings in these patients.