Inverted colonic diverticulum: An endoscopic examination and presentation.

Area of Science:

• Gastroenterology
• Endoscopy
• Colorectal Surgery

Background:

• Colonic diverticula are common, but inverted colonic diverticulum (ICD) can mimic neoplastic polyps.
• Misdiagnosis of ICD as polyps may lead to inappropriate interventions and adverse events.

Purpose of the Study:

• To determine the frequency, morphological characteristics, and differential diagnosis of ICD.
• To identify potential adverse events associated with ICD, particularly when misdiagnosed.

Main Methods:

• Retrospective analysis of 810 patients undergoing colonoscopy from April 2016 to November 2019.
• Evaluation of colonoscopic findings, including lesion morphology and diagnostic confirmation methods.

Main Results:

• ICD was observed in 1.73% of patients (14/810), predominantly in men (11/14).
• Most ICD lesions (63.16%) were located in the sigmoid colon and confirmed by eversion biopsy.
• One patient experienced perforation after hot biopsy forceps polypectomy, requiring surgery.

Conclusions:

• ICD is a recognized entity that requires careful differential diagnosis during colonoscopy.
• Failure to distinguish ICD from polyps can result in significant adverse events, highlighting the importance of accurate endoscopic assessment.