Metastasizing Pleomorphic Adenoma of the Salivary Gland

**Semantic type:** Neoplastic Process

**Definition:** A very rare pleomorphic adenoma of the salivary glands that metastasizes inexplicably, despite the benign histopathologic features. The most common sites of metastasis are bone, lung, and head and neck.

**Synonyms:** - Metastasizing Mixed Tumor of Salivary Gland - Metastasizing Mixed Tumor of the Salivary Gland