Fig. 3From: Clinicopathological characteristics of IgG4-related lung diseaseHistopathological findings of IgG4-related lung disease. a Dense lymphoplasmacytic cell infiltration and storiform fibrosis can be observed at low magnification (H&E; × 40). b Abundant lymphoplasmacytic cells and fibrosis can be observed at high magnification (H&E; × 200). c Numerous IgG4 + plasma cells are shown (IgG4 immunostaining; × 200). d Numerous IgG + plasma cells are shown (IgG immunostaining; × 200)Back to article page