prostatic intraepithelial neoplasia

(prah-STA-tik IN-truh-eh-puh-THEE-lee-ul NEE-oh-PLAY-zhuh) Noncancerous growth of the cells lining the internal and external surfaces of the prostate gland. Having high-grade prostatic intraepithelial neoplasia may increase the risk of developing prostate cancer. Also called PIN.