Write a short note on Meckel's diverticulum.
Meckel's diverticulum is the remnant of proximal part of vitellointestinal duct. Incidence is about 2-3%
- It is normally present in intrauterine life and disappears during 6th week of gestational life
- It develops from midgut
- It is present in 3% of individuals
Picture Source: Instant Anatomy
- Located proximal to ileocaecal valve
- It measures 2 inches
- Its Base attaches to the antimesenteric border of terminal ileum
- The Apex may be free or attached
- Arterial branches from superior mesenteric artery
- Venous collection through corresponding veins
- The lymph is collected through numerous lymph vessels around GIT
- Finally reaches the lymph node at origin of superior mesenteric artery
- The lumen of diverticulum is same as that of the ileum
- Has same mucosa as ileum but small heterotopic areas of gastric body type epithelium. Pancreatic, colonic or other GI tissues may also be present in the walls of diverticulum
- Unopposed secretion of gastric body type epithelium may produce ulcer and bleeding in adjacent normal ileum
- Diverticulum inflammation may mimic appendicitis. As, both arise from midgut, pain in both structures is referred to the periumbilical region
Author: A Rajkumar
- B.D.Charuasia fifth edition page no: 273-274.
- Gray anatomy 40th edition page no: 1129.