LB20.20

ICD-11 MMS 2026-01

Choledochal cyst

Index terms

  • Choledochal cyst
  • Congenital bile duct dilatation
  • Type 1-C Fusiform dilatation of the entire extrahepatic bile duct
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  • Type II Simple diverticula of the common bile duct
  • Type III Cyst or choledochocele distal intramural dilation of the common bile duct within the duodenal wall
  • Type IV A Combined intrahepatic and extrahepatic duct dilatation
  • Type IV B Multiple extrahepatic bile duct dilatations
  • Type V Caroli disease multiple intrahepatic bile duct dilatations

Inclusions

  • Congenital bile duct dilatation

Exclusions from above levels

  • http://id.who.int/icd/entity/733825440 – Inborn errors of metabolism

Sibling codes

  • LB20.21 – Biliary atresia
  • LB20.22 – Congenital stenosis or stricture of bile ducts
  • LB20.23 – Structural developmental anomalies of cystic duct
  • LB20.24 – Accessory bile duct
  • LB20.2Y – Other specified structural developmental anomalies of bile ducts
  • LB20.2Z – Structural developmental anomalies of bile ducts, unspecified

Foundation entity

Choledochal cyst – http://id.who.int/icd/entity/819487805

Part of: LB20.2: Structural developmental anomalies of bile ducts › LB20: Structural developmental anomalies of gallbladder, bile ducts or liver › 20: Developmental anomalies