Fig. 3.From: Pleuritis associated with immunoglobulin G4-related disease under normal thoracoscopic findings: a case reportPathological findings of the left pleura. Biopsy specimens stained with hematoxylin and eosin stain (a) and IgG4 immunostaining (b). Plasmacytoid, lymphocyte-dominated inflammatory cell infiltration was present. The formation of reactive lymphatic follicles was also foundBack to article page