When the Appendix Speaks: Colonoscopic Recognition of an Appendiceal Mucocele
Related Experiment Video
Updated: Nov 9, 2026

Murine Appendectomy Model of Chronic Colitis Associated Colorectal Cancer by Precise Localization of Caecal Patch
Published on: August 24, 2019
Caddie Nguyen1, Jackelyn Philip1, Lucas Youno1
1Gastroenterology, Lincoln Memorial University-DeBusk College of Osteopathic Medicine, Jacksonville, USA.
Abstract:
Appendiceal mucoceles are rare, often asymptomatic lesions caused by mucin accumulation within the appendix and carry a risk of rupture leading to pseudomyxoma peritonei. We report a case of a 60-year-old man undergoing routine screening colonoscopy in whom a smooth, dome-shaped protrusion of the appendiceal orifice was incidentally identified. No biopsy was performed due to concern for underlying appendiceal pathology. Contrast-enhanced CT revealed a 2.2-cm dilated, fluid-filled appendix consistent with a mucocele. The patient underwent elective laparoscopic appendectomy, and histopathology confirmed a low-grade appendiceal mucinous neoplasm confined to the appendix with negative margins. This case highlights the importance of careful endoscopic evaluation of the appendiceal orifice and timely surgical management to prevent complications.
Related Concept Videos
Appendicitis
Appendicitis-I: Introduction
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
Appendicitis-II: Diagnostic Studies and Management
Diagnosing Appendicitis
It requires a multifaceted approach, starting with a detailed physical examination to pinpoint the location and nature of the pain and identify any associated symptoms. Laboratory tests play a crucial role. A complete Blood Count (CBC) typically reveals leukocytosis (an increased number of...
Assessment of the Rectum and Anus
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Diverticular Disease of the Colon
Endoscopic Procedures II: Colonoscopy
