There Is No Role for Colonoscopy after Diverticulitis among Asian Patients Less than 50 Years of Age.

BACKGROUND Colonoscopy is advocated following acute diverticulitis to ensure that malignancy is not missed. In an Asian population, diverticulitis is more common in the right colon and in younger patients. The purpose of this study is to examine the utility of colonoscopy amongst Asian patients <50 years of age who have had colonic diverticulitis. METHODS A retrospective review of all patients aged 50 years and under who were treated for colonic diverticulitis between 2012 and 2014 was performed. All patients were advised to undergo a colonoscopy when the diverticulitis had settled, and findings at colonoscopy were recorded. RESULTS Fifty-five patients aged <50 years had acute diverticulitis. Forty-eight (87.3%) had right-sided diverticulitis. Amongst them, 45 (93.8%) had Hinchey 1a, 1b or 2 diverticulitis, while none had Hinchey 4 diverticulitis. Excluding the only patient that underwent a colonic resection, 27 (50.0%) patients returned for a colonoscopy. None of these patients were found to have colorectal cancer or an advanced adenoma. Six (11.1%) of them had adenomas with low-grade dysplasia. CONCLUSION Right-sided diverticulitis is more common in the young Asian population. Most patients can be conservatively treated. Follow-up colonoscopy may not be required in these patients.