title: [Biliary-colonic fistulas. Analysis of 2 cases and literature review].
abstract: BACKGROUND
  Bilioenteric fistulas are entities whose etiology can be diverse.
  
  
  OBJECTIVE
  The aim of this paper was to present two cases of biliary-colonic fistulas with different presentations and to review existing literature regarding etiology, diagnosis, and management of these patients.
  
  
  METHODS
  Two cases of biliary-colonic fistulas were reviewed.
  
  
  RESULTS
  Case 1. A 48-year-old woman presented with lower gastrointestinal bleeding secondary to cholecystocolonic fistula in context of cholelithiasis. Case 2. A 60-year-old woman with multiple hepatic abscess associated with biliary-colonic fistula secondary to adenocarcinoma of gallbladder.
  
  
  CONCLUSIONS
  Biliary-colonic fistulas are recognized complications of cholelithiasis. Association with neoplasia is less frequent. Preoperative diagnosis is difficult and management must be surgical.
authors.affiliation: Departamento de Cirugía General, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Col. Sección XVI, Tlalpan, México, D.F. CP 14000.
authors.forename: Antonio
authors.initials: A
authors.lastname: Ramos-De la Medina
authors.forename: Heriberto
authors.initials: H
authors.lastname: Medina-Franco
mesh_terms: D001658:Biliary Fistula / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D002758:Cholangiography; D003108:Colonic Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D013505:Digestive System Surgical Procedures / Q000379:methods; D005260:Female; D006801:Humans; D007412:Intestinal Fistula / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome