title: Tuberculous pseudotumor causing biliary obstruction. Report of a case with diagnosis by fine needle aspiration biopsy and bile cytology.
abstract: Hepatobiliary tuberculosis is a rare but distinct clinical entity. We report an unusual case of biliary tract obstruction due to localized hepatic tuberculosis with periportal tuberculous adenitis. The lesion mimicked a malignancy clinically and radiologically. Fine needle aspiration biopsy revealed granulomas, epithelioid histiocytes and Langhans' giant cells. The cytodiagnosis was confirmed by identification of acid-fast bacilli in the bile cytology and isolation of Mycobacterium tuberculosis by culture. The patient responded to antituberculosis therapy. The usefulness of bile cytology in the diagnostic management of biliary tract obstruction is illustrated.
authors.affiliation: Department of Pathology, National University Hospital, Singapore.
authors.forename: A
authors.initials: A
authors.lastname: Wee
authors.forename: B
authors.initials: B
authors.lastname: Nilsson
authors.forename: T L
authors.initials: TL
authors.lastname: Wang
authors.forename: I
authors.initials: I
authors.lastname: Yap
authors.forename: P Y
authors.initials: PY
authors.lastname: Siew
mesh_terms: D001646:Bile / Q000166:cytology; D001707:Biopsy, Needle; D002779:Cholestasis / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D003581:Cytodiagnosis; D003937:Diagnosis, Differential; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed; D014386:Tuberculosis, Hepatic / Q000150:complications* / Q000175:diagnosis / Q000473:pathology