label: Prostatic Intraepithelial Neoplasia
label_lc: prostatic intraepithelial neoplasia
description: A neoplastic proliferation of the epithelial cells that line the acini and the ducts of the prostate gland.  The neoplastic epithelial cells are confined within the acini and the ducts and they do not invade the surrounding prostatic stroma.  Morphologically, it is classified as low or high grade.