Ectopic gastric mucosa in a polyp causing ileo-ileal intussusception: a case report of a three-month-old baby.

Ectopic gastric mucosa in the small bowel not associated with Meckel's diverticulum, is rare. Most of the few cases found in the literature are symptomatic and complicated. We report a case of a three month-old baby, the youngest patient reported thus far. He had ectopic gastric mucosa in a polypoid lesion of the mid-ileum, which caused ileo-ileal intussusception.