title: Ectopic gastric mucosa in duplication of the rectum presenting as a perianal fistula.
mesh_terms: D002675:Child, Preschool; D002828:Choristoma / Q000175:diagnosis*; D005260:Female; D005753:Gastric Mucosa; D006801:Humans; D007223:Infant; D012003:Rectal Fistula / Q000175:diagnosis; D012004:Rectal Neoplasms / Q000175:diagnosis*; D012007:Rectum / Q000002:abnormalities*