Figure 1
From: IgG4 plasma cells in inflammatory myofibroblastic tumor: inflammatory marker or pathogenic link?
(a) Inflammatory myofibroblastic tumor showing intersecting fascicles of spindled myofibroblasts with intervening, pleomorphic ganglion-like cells and interspersed lymphocytes and plasma cells, H & E, × 20 magnification. (b) ALK immunohistochemical stain showing granular cytoplasmic staining in the spindled cells, × 40. (c) SMA immunohistochemical stain with strong, cytoplasmic positivity, × 40. (d). IgG4 immunohistochemical stain highlighting plasma cells within the inflammatory infiltrate, × 40.
