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

Figure 1

A case showing tightly clustered glands, with few intervening stomata. This architecture raised some suspicion, and the cytology advocates for a benign lesion. After basal cell staining a hyperplastic nodule was diagnosed (H&E, ×400).