Routine colonoscopy may be needed for uncomplicated acute right colonic diverticulitis

Area of Science:

• Gastroenterology
• Colorectal Surgery
• Oncology

Background:

• Colon cancer screening guidelines often recommend colonoscopy after diverticulitis treatment.
• The necessity of routine colonoscopy for uncomplicated diverticulitis, particularly right-sided, remains debated.
• Right colon diverticulitis affects younger individuals, necessitating specific evaluation of follow-up strategies.

Purpose of the Study:

• To assess the incidence of right colon cancer and adenomatous polyps after conservative management of acute uncomplicated right colon diverticulitis.
• To evaluate the clinical relevance of routine colonoscopy surveillance in this patient population.

Main Methods:

• Retrospective analysis of 330 patients with uncomplicated right colon diverticulitis (modified Hinchey stage Ia) diagnosed via CT scan between 2011-2017.
• Inclusion criteria required follow-up colonoscopy after treatment.
• Primary outcome: colon cancer incidence; Secondary outcome: adenoma detection rate.

Main Results:

• Colon cancer was detected in 0.3% (1/330) of patients.
• Adenoma detection rate was 20.9% (69/330).
• Advanced adenomas (including cancer) were found in 2.7% (9/330) of patients, with a mean age of 41.9 years.

Conclusions:

• Routine colonoscopy following acute uncomplicated right colon diverticulitis is warranted.
• Despite a low colon cancer detection rate, follow-up colonoscopy can identify significant advanced adenomas.
• This strategy is particularly relevant for younger patients diagnosed with right-sided diverticulitis.