Korean J Gastroenterol.  2024 Jul;84(1):24-27. 10.4166/kjg.2024.049.

The Diagnostic Dilemma of Follicular Cholangitis Resembling Hilar Cholangiocarcinoma

• Lee J

• KMID: 2558286
• DOI: http://doi.org/10.4166/kjg.2024.049

Figure

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  Fig. 1 Biliary protocol CT. The CT scan of the biliary system displayed a 38 mm thickening.

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  Fig. 2 ERCP. The ERCP imaging demonstrated irregular constrictions from the hilar to the common bile duct, along with dilations in the intrahepatic ducts.

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  Fig. 3 Microscopic findings (hematoxylin & eosin). The hematoxylin and eosin stained sections showed widespread thickening of the bile duct wall due to a transmural infiltration of lymphoid cells, with the formation of hyperplastic lymphoid follicles (A) and significant extension into the surrounding pericholedochal soft tissue (B).

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  Fig. 4 Immunohistochemistry staining. The Immunohistochemistry staining highlighted lymphoid follicles surrounded by CD20-positive B cells (A) and CD3-positive T cells (B), with no evidence of lymphoepithelial lesions.

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