Choledochal cysts (a.k.a. bile duct cyst) are congenital conditions involving cystic dilatation of bile ducts. ... They are uncommon in western countries but not as rare ...CholedochalcystsFromWikipedia,thefreeencyclopediaJumptonavigationJumptosearchNottobeconfusedwithColloidcyst.MedicalconditionCholedochalcystsOthernamesBileductcystDifferenttypesofcholedochalcystsSpecialtyMedicalgenetics Choledochalcysts(a.k.a.bileductcyst)arecongenitalconditionsinvolvingcysticdilatationofbileducts.[1]Theyareuncommoninwesterncountries[2]butnotasrareinEastAsiannationslikeJapanandChina.Contents1Signsandsymptoms2Diagnosis2.1Types3Treatment4References5ExternallinksSignsandsymptoms[edit]Mostpatientshavesymptomsinthefirstyearoflife.Itisrareforsymptomstobeundetecteduntiladulthood,andusuallyadultshaveassociatedcomplications.Theclassictriadofintermittentabdominalpain,jaundice,andarightupperquadrantabdominalmassisfoundonlyinminorityofpatients.[citationneeded]Ininfants,choledochalcystsusuallyleadtoobstructionofthebileductsandretentionofbile.Thisleadstojaundiceandanenlargedliver.Iftheobstructionisnotrelieved,permanentdamagemayoccurtotheliver-scarringandcirrhosis-withthesignsofportalhypertension(obstructiontotheflowofbloodthroughtheliver)andascites(fluidaccumulationintheabdomen).Thereisanincreasedriskofcancerinthewallofthecyst.[citationneeded]Inolderindividuals,choledochalcystsaremorelikelytocauseabdominalpainandintermittentepisodesofjaundiceandoccasionallycholangitis(inflammationwithinthebileductscausedbythespreadofbacteriafromtheintestineintothebileducts).Inflammationofthepancreasalsomayoccur.Thecauseofthesecomplicationsmayberelatedtoeitherabnormalflowofbilewithintheductsorthepresenceofgallstones.[citationneeded]Diagnosis[edit]DirecthyperbilirubinemiaTypes[edit]Theywereclassifiedinto5typesbyTodaniin1977.[3]Classificationwasbasedonsiteofthecystordilatation.TypeItoIVhasbeensubtyped.TypeI:Mostcommonvariety(80-90%)involvingsaccularorfusiformdilatationofaportionorentirecommonbileduct(CBD)withnorma