title: IgG4-associated sclerosing cholangitis masquerading as hilar cholangiocarcinoma.
abstract: IgG4-sclerosing cholangitis (IgG4-SC) commonly presents with type 1 autoimmune pancreatitis. Isolated IgG4-SC is rare. Differentiating IgG4-SC from cholangiocarcinoma preoperatively is challenging due to overlapping radio-clinical manifestations and difficult preoperative histology. We present three cases preoperatively diagnosed and surgically treated as hilar cholangiocarcinoma. First and second cases presented with cholangiocarcinoma with portal vein involvement and third with a malignant-appearing hilar stricture. On histopathology, IgG4-SC was diagnosed in the first two cases. Third patient had raised serum IgG4, and histopathology was inconclusive for IgG4-SC and negative for malignancy. However, she responded to steroid therapy.
authors.affiliation: Department of Surgical Oncology, Lilavati Hospital and Research Centre, A-791, Bandra Reclamation, Bandra West, Mumbai, 400 050, India.
authors.forename: Kamal Sunder
authors.initials: KS
authors.lastname: Yadav
authors.affiliation: Department of Surgical Oncology, Lilavati Hospital and Research Centre, A-791, Bandra Reclamation, Bandra West, Mumbai, 400 050, India.
authors.forename: Priyanka Akhilesh
authors.initials: PA
authors.lastname: Sali
authors.affiliation: Department of Surgical Oncology, Lilavati Hospital and Research Centre, A-791, Bandra Reclamation, Bandra West, Mumbai, 400 050, India.
authors.forename: Verushka M
authors.initials: VM
authors.lastname: Mansukhani
authors.affiliation: Department of Surgical Oncology, Lilavati Hospital and Research Centre, A-791, Bandra Reclamation, Bandra West, Mumbai, 400 050, India.
authors.forename: Rajiv
authors.initials: R
authors.lastname: Shah
authors.affiliation: Department of Surgical Oncology, Lilavati Hospital and Research Centre, A-791, Bandra Reclamation, Bandra West, Mumbai, 400 050, India. drjagannath.office@gmail.com.
authors.forename: P
authors.initials: P
authors.lastname: Jagannath
mesh_terms: D000368:Aged; D001650:Bile Duct Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D015415:Biomarkers / Q000097:blood; D015209:Cholangitis, Sclerosing / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D018285:Klatskin Tumor / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D015415:Biomarkers; D007074:Immunoglobulin G
keywords: Cholangiocarcinoma; IgG4; Sclerosing cholangitis