Figure 2From: Inflammatory pseudotumors of the kidney and the lung presenting as immunoglobulin G4-related disease: a case report Right renal mass. (A) Fibrous tissue involving glomeruli, with infiltration of lymphocytes and plasma cells (hematoxylin and eosin staining, low power); (B) IgG4-positive plasma cells (44 cells/HPF, IgG4 immunostaining).Back to article page