p40 as a Basal Cell Marker in the Diagnosis of Prostate Glandular Proliferations: A Comparative Immunohistochemical Study with 34betaE12

Figure 6

Same case as shown in Figure 4. Complete lack of basal cells on p40 immunohistochemistry. There is some weak nonspecific cytoplasmic staining of tumor cells. Basal cells are evident in adjacent noninfiltrative glands displaying features of intraepithelial neoplasia/PIN (×100).