Which set correctly describes the classical 'rule of 2s' applied to Meckel diverticulum?

• A 2 percent prevalence, 2 feet from duodenojejunal flexure, 2 inches wide, presents at age 12 years, contains ectopic pancreas only
• B 2 percent prevalence, 2 cm from ileocaecal valve, 2 cm wide, presents at age 20 years, contains 2 layers of muscle
• C Occurs in 2 percent of adults, 2 metres from caecum, 2 cm long, bleeds twice, contains ectopic colon
• D 2 percent prevalence, 2 feet from ileocaecal valve, 2 inches long, presents before age 2 years, contains 2 types of ectopic tissue ✓

Explanation

Meckel diverticulum is a true diverticulum from incomplete obliteration of the vitellointestinal duct. The rule of 2s states it occurs in about 2 percent of the population, lies within 2 feet of the ileocaecal valve, averages 2 inches in length, commonly presents before age 2 years with painless lower gastrointestinal bleeding, and contains ectopic gastric mucosa or pancreatic tissue. Ectopic gastric mucosa secreting acid causes ulceration of adjacent ileal mucosa, which explains the bleeding.

Reference: Bailey and Love's Short Practice of Surgery, 27th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.