Meckel's diverticulum is a remnant of the vitello-intestinal (omphalomesenteric) duct. Which of the following statements about its anatomy is MOST accurate for NEET PG?

• A Located on the mesenteric border of ileum, 2 feet from ileocecal valve
• B Derived from the allantois and contains transitional epithelium
• C Found equally on both borders of the jejunum
• D Located on the antimesenteric border of the ileum, 2 feet from the ileocecal valve, found in 2% of population with 2% symptomatic, contains 2 types of heterotopic mucosa (gastric and pancreatic) ✓

Explanation

Meckel's diverticulum is a true diverticulum (all layers of bowel wall) located on the antimesenteric border of the ileum. The 'Rule of 2s': 2% prevalence, 2 feet (60 cm) from the ileocecal valve, 2 inches long, 2:1 male predominance, presents in first 2 years of life, contains 2 types of ectopic tissue (most commonly gastric mucosa — causing painless rectal bleeding, and pancreatic tissue). It is derived from the vitello-intestinal duct, not the allantois (which forms the urachal remnant/urachus).

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.