A Meckel's diverticulum is a persistence of the vitelline duct (omphalomesenteric duct), creating an ileal diverticulum, usually on the antimesenteric border. It is within 2 ft of ileocecal valve, present in 2% of the population, and 2% are symptomatic.
January 2001. Arch Surg. 2001;136(1):89. doi:10.1001/archsurg.136.1.89