Tumours of the biliary system.
D001661:Biliary Tract Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000628:therapy; D002758:Cholangiography; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003581:Cytodiagnosis; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography