Figure 2.
Photomicrographs of Case 1. (a, b) High-power photomicrographs showing inflammatory cells infiltrating the pituitary lesion (a) and the dura mater (b). Hematoxylin and eosin staining, original magnification × 200. (c) Immunohistochemical staining showing infiltrated plasmacytes positive for IgG4 in the pituitary tissue. Original magnification × 200.