title: Rectal gastric mucosa heterotopia as a cause of hematochezia in an infant.
mesh_terms: D002828:Choristoma / Q000151:congenital*; D005243:Feces / Q000032:analysis; D005753:Gastric Mucosa / Q000002:abnormalities*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology* / Q000235:genetics; D006801:Humans; D007223:Infant; D008297:Male; D012004:Rectal Neoplasms / Q000151:congenital*; D012007:Rectum / Q000002:abnormalities* / Q000601:surgery