Fig. 5From: Follicular cholangitis mimicking a common bile duct cancer: a case reportIHC. A The infiltrating lymphocytes constitute a heterogeneous population of cells that are positive for CD3. B Infiltrating cells also positive for CD20. C Many CD138-positive plasma cells are scattered around the lymphoid follicles. D There are few IgG4-positive plasma cells in this lesionBack to article page