RadiologyKeyFastestRadiologyInsightEngineHomeLogInCategoriesA-KBREASTIMAGINGCARDIOVASCULARIMAGINGCOMPUTERIZEDTOMOGRAPHYEMERGENCYRADIOLOGYFETALMEDICINEFRCRREADINGLISTGASTROINTESTINALIMAGINGGENERALRADIOLOGYGENITOURINARYIMAGINGHEAD&NECKIMAGINGINTERVENTIONALRADIOLOGYL-ZMAGNETICRESONANCEIMAGINGMUSCULOSKELETALIMAGINGNEUROLOGICALIMAGINGNUCLEARMEDICINEOBSTETRICS&GYNAECOLOGYIMAGINGPEDIATRICIMAGINGRADIOGRAPHICANATOMYRESPIRATORYIMAGINGULTRASONOGRAPHYMoreReferencesAbdominalKeyAnesthesiaKeyBasicmedicalKeyOtolaryngology&OphthalmologyMusculoskeletalKeyNeupsyKeyNurseKeyObstetric,GynecologyandPediatricOncology&HematologyPlasticSurgery&DermatologyClinicalDentistryRadiologyKeyThoracicKeyVeterinaryMedicineAboutContactGoldMemberMenuCholedochalCyst Diagnosisrequiresexcludingothercausesofbiliarydilatation,includingtumor,stone,orstricture Commonlyassociatedwithcholelithiasis,cystolithiasis,choledocholithiasis,andhepatolithiasis• Classifiedinto5types basedonTodaniclassification TypeI:Fusiform/cysticdilationofextrahepaticduct TypeII:TruediverticulumofsupraduodenalED TypeIII:DilationlimitedtointraduodenalsegmentofED(a.k.a.choledochocele),withdilatedsegmentofductlocatedwithinduodenalwall TypeIV:Presenceofmultiplebiliarycysts,atleast1ofwhichmustinvolveextrahepaticbileduct TypeV:Singleormultipleintrahepaticbiliarycysts,withmultipleintrahepaticcystsknownasCarolidiseasePATHOLOGY• EtiologymayberelatedtoanomalouspancreaticobiliaryjunctionorcongenitalductalplatemalformationCLINICALISSUES• Mostcommoninfemalepatients,oftenofAsiandescent• Usuallydiagnosedininfancyandchildhood• Classictriadofsymptoms:RecurrentRUQpain,jaundice,andpalpablemass• Complications:Stones,cholangitis,pancreatitis,ormalignantdegeneration(cholangiocarcinomaorgallbladdercancer)• Treatmentvariesdependingontypeofcholedochalcyst,buttypeIandIVcyststypicallyundergosurgicalexcisionandreconstructionbyRoux-en-Yhepaticojejunostomy(Left)ThisgraphicshowstheTodaniclassificationofcholedochalcysts.NotethattypeIisfusiformdilationoftheextrahepaticd