title: Heterotopic gastric mucosa involving the gallbladder and biliary tree.
abstract: A case of heterotopic gastric mucosa in the common bile duct, cystic duct and gallbladder is reported in a 3-year-old girl with abdominal pain and jaundice. Abdominal US and CT showed dilatation of the biliary tree and a well-defined mass in the common bile duct that narrowed its lumen. The gallbladder was contracted in both examinations. The common bile duct and the gallbladder were resected and a choledochojejunostomy was performed. Although gastric heterotopy has been described throughout the entire length of the gastrointestinal tract, it is a very uncommon finding in the gallbladder and extremely rare in the biliary tree. A firm diagnosis of gastric heterotopia is based on the presence of fundal mucosa replete with parietal and chief cells. To our knowledge, this is the fifth reported case of heterotopic gastric tissue within the common bile duct, and the first to describe the US and CT findings. A relevant literature review and brief outline of the histological and radiological features are included in the discussion.
authors.affiliation: Department of Paediatric Radiology, Hospital Infantil "La Paz", Paseo de la Castellana 261, 28046 Madrid, Spain. cprieto@hulp.insalud.es
authors.forename: Carmen
authors.initials: C
authors.lastname: Madrid
authors.forename: Teresa
authors.initials: T
authors.lastname: Berrocal
authors.forename: Luis
authors.initials: L
authors.lastname: Gorospe
authors.forename: Consuelo
authors.initials: C
authors.lastname: Prieto
authors.forename: Manuel
authors.initials: M
authors.lastname: Gámez
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis / Q000209:etiology; D001660:Biliary Tract Diseases / Q000175:diagnosis*; D002675:Child, Preschool; D002828:Choristoma / Q000175:diagnosis*; D003549:Cystic Duct; D003937:Diagnosis, Differential; D005260:Female; D005753:Gastric Mucosa; D006801:Humans; D007565:Jaundice / Q000175:diagnosis / Q000209:etiology; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional