title: [A colonic structure in the placenta: a simple teratoma coaetans or ectopic differentiation?].
abstract: A cylindrical structure which was closed on either side and covered by the amnion was found in a placenta. Histological examination showed well differentiated wall of large intestine with sympathetic plexus. Several hypothesis are discussed: teratoma, fetus acardiacus amorphus, anomalous differentiation of the yolk sac.
mesh_terms: D000328:Adult; D002454:Cell Differentiation; D002828:Choristoma / Q000175:diagnosis; D003106:Colon; D003560:Cysts / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D005333:Fetus; D006801:Humans; D010920:Placenta / Q000473:pathology*; D011247:Pregnancy; D013724:Teratoma / Q000175:diagnosis; D014817:Vitelline Membrane / Q000473:pathology
vernacular_title: Une structure colique à localisation placentaire: teratome coaetans simplifié ou différenciation ectopique?