Routine Colonoscopy after Acute Uncomplicated Diverticulitis - Challenging a Putative Indication.

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Oncology

Background:

• International guidelines often suggest routine colonoscopy post-diverticulitis to detect colorectal cancer.
• Evidence supporting routine colonoscopy after diverticulitis is limited and inconsistent.
• This study evaluates the necessity of routine colonoscopy following CT-diagnosed acute diverticulitis.

Purpose of the Study:

• To determine the incidence of advanced colonic neoplasia (ACN) detected by colonoscopy after acute diverticulitis.
• To assess the need for routine colonoscopy in patients managed conservatively for acute diverticulitis.

Main Methods:

• Retrospective analysis of patients hospitalized for acute diverticulitis (July 2008 - June 2013).
• Exclusion of patients with colonoscopy performed over one year post-episode.
• Definition of advanced adenoma (AA) and advanced colonic neoplasia (ACN), including colorectal cancer (CRC).

Main Results:

• 252 of 364 patients (69%) underwent colonoscopy; 14.7% had adenomatous polyps, 5.1% had AA, and 3.2% had CRC.
• Complicated diverticulitis cases showed a significantly higher ACN rate (20.9%) than uncomplicated cases (5.7%).
• Age ≥50 and CT-diagnosed abscess were significant risk factors for ACN.

Conclusions:

• Patients with diverticulitis complicated by abscess face an elevated risk of ACN on follow-up colonoscopy.
• The ACN prevalence in uncomplicated diverticulitis mirrors the average-risk population.
• CT-diagnosed uncomplicated diverticulitis alone does not warrant routine colonoscopy.