Intraepithelial prostatic neoplasia: a new dysplastic lesion of the prostate

Prostatic Intraepithelial Neoplasia were studied retrospectively in 455 cases of surgically resected prostates: 387 benign hypertrophies and 68 adenocarcinomas. The frequency of PIN was highest among prostatic adenocarcinomas well differentiated while the benign hypertrophies showed a lower frequency and a moderate increase with age. The prognostic importance of this lesion in prostatic biopsies is discussed on account of its strong predictive value.