Parotid Gland Basal Cell Adenocarcinoma

**Semantic type:** Neoplastic Process

**Definition:** A rare adenocarcinoma of the parotid gland, originating from basaloid, myoepithelial, and ductal cells. While morphologically it resembles basal cell carcinoma, it is a distinct entity. The tumor is not encapsulated, may invade locally, and less frequently may metastasize. It usually occurs in older patients.