Figure 5.

Heterogeneity of expression of GSTP1 in PIA. Note areas of positive staining intermixed with areas of negative staining for GSTP1. The inset is a higher power view from the boxed area, showing the border zone between these areas. This lesion was classified as having mild chronic inflammation. Immunoperoxidase, ×100. Inset: Arrow indicates an atrophic secretory cell staining negatively, and the arrowhead indicates a nearby atrophic secretory cell staining positively. Magnification, ×400.