ForYouNews&PerspectiveDrugs&DiseasesCME&EducationAcademyVideoDecisionPointEdition:ENGLISHDEUTSCHESPAÑOLFRANÇAISPORTUGUÊSLogInSignUpIt'sFree!Edition:ENGLISHDEUTSCHESPAÑOLFRANÇAISPORTUGUÊSRegisterLogInNoResultsNoResultsForYouNews&PerspectiveDrugs&DiseasesCME&EducationAcademyVideoDecisionPointclosePleaseconfirmthatyouwouldliketologoutofMedscape.Ifyoulogout,youwillberequiredtoenteryourusernameandpasswordthenexttimeyouvisit.LogoutCancelhttps://profreg.medscape.com/px/getpracticeprofile.do?method=getProfessionalProfile&urlCache=aHR0cHM6Ly9lbWVkaWNpbmUubWVkc2NhcGUuY29tL2FydGljbGUvMTcyMDk5LXdvcmt1cA==processing....Drugs&Diseases>GastroenterologyCholedochalCysts WorkupUpdated:Jul01,2020Author:EmilyTommolino,MD;ChiefEditor:BSAnand,MD more...ShareEmailPrintFeedbackCloseFacebookTwitterLinkedInGoogle+SectionsCholedochalCystsSectionsCholedochalCystsOverviewPracticeEssentialsBackgroundPathophysiologyEpidemiologyPrognosisShowAllPresentationDDxWorkupLaboratoryStudiesImagingStudiesHistologicFindingsShowAllTreatmentApproachConsiderationsMedicalCareSurgicalCareShowAllQuestions&AnswersMediaGalleryReferencesWorkupLaboratoryStudiesNolaboratorystudiesarespecificforthediagnosisofacholedochalcyst.CompletebloodcellcountAnelevatedwhitebloodcellcountwithincreasednumbersofneutrophilsandimmatureneutrophilformsmaybeobservedinthepresenceofcholangitis.LiverfunctionstudiesLiverfunctiontestsmaybeusefulinnarrowingthedifferentialdiagnosis.Hepatocellularenzymeandalkalinephosphataselevelsmaybeelevated.Noneofthesetestsarespecificforthediagnosisofacholedochalcyst.Serumamylaseandlipaseconcentrationsmaybeincreasedinthepresenceofpancreatitis.Serumamylaseconcentrationsalsomaybeelevatedinbiliaryobstructionandcholangitis.ChemistrypanelResultsofserumchemistrymaybeabnormalifthepatientisvomiting.Onemightexpecttoseeahypochloremic,hypokalemicmetabolicalkalosisinthisclinicalpicture.Next:ImagingStudiesUltrasonographyAbdominalultrasonographyisthetestofchoiceforthediagnosisofacholedochalcyst.Ultrasonographyisusefulinthean