RT Journal Article SR Electronic T1 Morphological identification of the patterns of prostatic intraepithelial neoplasia and their importance JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 655 OP 665 DO 10.1136/jcp.53.9.655 VO 53 IS 9 A1 Montironi, Rodolfo A1 Mazzucchelli, Roberta A1 Algaba, Ferran A1 Lopez-Beltran, Antonio YR 2000 UL http://jcp.bmj.com/content/53/9/655.abstract AB High grade prostatic intraepithelial neoplasia (PIN) is the most likely precursor of prostatic carcinoma. PIN has a high predictive value as a marker for carcinoma, and its identification in biopsy specimens warrants repeat biopsy for concurrent or subsequent carcinoma. The only methods of detection are biopsy and transurethral resection; PIN does not greatly raise the concentration of serum prostate specific antigen (PSA) or its derivatives, does not induce a palpable mass, and cannot be detected by ultrasound. Androgen deprivation decreases the prevalence and extent of PIN, suggesting that this form of treatment might play a role in chemoprevention. Radiotherapy is also associated with a decreased incidence of PIN.