Finasteride decreases the risk of prostatic intraepithelial neoplasia.
Thompson IM, Lucia MS, Redman MW, Darke A, La Rosa FG, Parnes HL, Lippman SM, Coltman CA. Finasteride decreases the risk of prostatic intraepithelial neoplasia. J Urol. 2007 Jul; 178(1):107-9; discussion 110.