Biliary stricture as an atypical presentation of type 2 autoimmune pancreatitis: A case report

doi:10.3748/wjg.v32.i16.117109

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Apr 28, 2026 (publication date) through Apr 20, 2026

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World Journal of Gastroenterology

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1007-9327

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

Case Report

Copyright: ©Author(s) 2026. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) license. No commercial re-use. See permissions. Published by Baishideng Publishing Group Inc.

World J Gastroenterol. Apr 28, 2026; 32(16): 117109
Published online Apr 28, 2026. doi: 10.3748/wjg.v32.i16.117109

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Figure 1 Timeline of the clinical course of this case. ERCP: Endoscopic retrograde cholangiopancreatography; EUS: Endoscopic ultrasound; IDUS: Intraductal ultrasonography.

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Figure 2 Representative imaging and endoscopic photographs. A: Contrast-enhanced abdominal computed tomography shows enlargement of the pancreatic head (arrows); B: Magnetic resonance cholangiopancreatography reveals irregular narrowing of the common bile duct (CBD) (left, arrows) and mild dilatation of the pancreatic duct (right, arrows); C: Endoscopic ultrasonography demonstrates thickening of the CBD wall (arrows); D: Endoscopic retrograde cholangiopancreatography shows the pancreatic duct (right arrows) and bile duct (left arrows); E: Intraductal ultrasound image reveals circumferential wall thickening of the distal CBD (arrows); F: Choledochoscopy during the second endoscopic retrograde cholangiopancreatography.

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Figure 3 Representative histological images. A: Hematoxylin and eosin staining of pancreas, with arrows indicating the granulocytic epithelial lesions; B: Immunoglobulin G4 staining of pancreas.

Citation: Wang KR, Sha SM, Wang SH, Zhao P, Shi HT, Liu L, Wu J, Zhao G. Biliary stricture as an atypical presentation of type 2 autoimmune pancreatitis: A case report. World J Gastroenterol 2026; 32(16): 117109
URL: https://www.wjgnet.com/1007-9327/full/v32/i16/117109.htm
DOI: https://dx.doi.org/10.3748/wjg.v32.i16.117109