[Histological classification of prostatic cancer].

Histological classification of prostatic cancer with a special focus on adenocarcinoma was reviewed according to "General Rule for Clinical and Pathological Studies on Prostatic Cancer (The 2nd Edition, 1992) published by Japanese Urological Association and The Japanese Society of Pathology. The points of the classification are as follows; (1) adenocarcinoma is separated into 3 categories, namely, well, moderately and poorly differentiated types, by structural features. (2) nuclear grading does not commit for making a subclassification of prostatic adenocarcinoma. The other types of primary malignancies are rare in the prostate. Prostatic intraepithelial neoplasia should be discussed in the further revision of the classification.