title: Diagnostic criteria for congenital biliary dilatation 2015.
abstract: BACKGROUND
  The Diagnostic Criteria for Pancreaticobiliary Maljunction 2013 were published by the Japanese Study Group on Pancreaticobiliary Maljunction (JSGPM) in 2014. The committee of JSGPM for diagnostic criteria for pancreaticobiliary maljunction has established the standard diameter of the bile duct, and a definition of dilatation of the bile duct was proposed in 2014.
  
  
  METHODS
  The committee of JSGPM prepared the diagnostic criteria for congenital biliary dilatation in 2014, and a final revised version was approved in 2015.
  
  
  RESULTS
  Congenital biliary dilatation is defined as a congenital malformation involving both local dilatation of the extrahepatic bile duct, including the common bile duct, and pancreaticobiliary maljunction. However, cases associated with intrahepatic bile duct dilatation can also be included. Various kinds of pathological conditions can occur on hepatobiliary systems and pancreas by bile duct dilatation and pancreaticobiliary maljunction. For a diagnosis of congenital biliary dilatation, both abnormal dilatation of the bile duct and pancreaticobiliary maljunction must be evident by either imaging test or anatomical examination. Acquired or secondary dilatation of the bile duct by obstruction due to biliary stones or malignancy should be strictly excluded.
  
  
  CONCLUSIONS
  Diagnostic criteria for congenital biliary dilatation 2015 were established from Japan representing a world first.
authors.affiliation: Division of Pediatric Surgery, Department of Surgery, Kansai Medical University, Hirakata City, Osaka, Japan. hamaday@hirakata.kmu.ac.jp.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Hamada
authors.affiliation: Aichi Prefectural Colony, Kasugai, Japan.
authors.forename: Hisami
authors.initials: H
authors.lastname: Ando
authors.affiliation: Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, Tokyo, Japan.
authors.forename: Terumi
authors.initials: T
authors.lastname: Kamisawa
authors.affiliation: Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan.
authors.forename: Takao
authors.initials: T
authors.lastname: Itoi
authors.affiliation: Department of Pediatric Surgery, Shizuoka Children's Hospital, Shizuoka, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Urushihara
authors.affiliation: Division of Pediatric Surgery, Department of Surgery, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Tsugumichi
authors.initials: T
authors.lastname: Koshinaga
authors.affiliation: Department of Pediatric Surgery, Chiba University School of Medicine, Chiba, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Saito
authors.affiliation: First Department of Surgery, University of Yamanashi, Kofu, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Fujii
authors.affiliation: Division of Pediatric Surgery, Department of Surgery, Osaka City University School of Medicine, Osaka, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Morotomi
mesh_terms: D001653:Bile Ducts, Intrahepatic / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D001662:Biliary Tract Surgical Procedures / Q000379:methods; D015529:Choledochal Cyst / Q000000981:diagnostic imaging* / Q000601:surgery; D004065:Digestive System Abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D004108:Dilatation, Pathologic / Q000151:congenital / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007564:Japan; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D010183:Pancreatic Ducts / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D012680:Sensitivity and Specificity; D018608:Ultrasonography, Doppler / Q000379:methods
keywords: Congenital biliary dilatation; Pancreaticobiliary maljunction