Fig. 1.

Histological examination and grading of prostate tissues. Representative light microscopic images showing hematoxylin and eosin staining of nonneoplastic and neoplastic lesions in study participants. Normal prostate has two unique features: (A) Presence of larger glands. (B) Presence of corpora amylacea, pink secretions-like structure. Two factors confirm prostate adenocarcinoma. (C) Absence of glands or smaller glands. (D) Presence of perineural invasion of nerve bundles. (E) Occurrence of neoplastic glandular structure in lower-grade tumors. (F) Absence of glands in higher-grade tumors.