Fig. 2From: IgG4-related pleural disease in a patient with pulmonary adenocarcinoma under durvalumab treatment: a case report(a) Microscopic examination revealed lymphoplasmacytic infiltration with storiform fibrosis. (b) Immunochemical staining showed the presence of numerous IgG4-positive plasma cells. The number of IgG4-positive cells was > 20/high power field (× 400). (c) Immunochemical staining showed the presence of IgG-positive plasma cells (× 400)Back to article page