Prostatic Intraepithelial Neoplasia

**Semantic type:** Neoplastic Process

**Definition:** 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.

**Synonyms:** - PIN - PIN - PIN - Prostatic Intraepithelial Neoplasia - Prostate intraepithelial neopl. - Prostate intraepithelial neoplasia (PIN) - prostatic intraepithelial neoplasia