Lacrimal Gland Pleomorphic Adenoma

**Semantic type:** Neoplastic Process

**Definition:** A benign, usually encapsulated neoplasm of the lacrimal gland composed of epithelial and mesenchymal cells. Pleomorphic adenomas are neoplasms that develop in the salivary glands or heterotopic salivary gland tissues. It has been suggested that myoepithelial cells play a major role in the histogenesis of these tumors. In the lacrimal gland, pleomorphic adenomas presumably develop from metaplastic myoepithelial cells.

**Synonyms:** - Benign Mixed Tumor of Lacrimal Gland - Benign Mixed Tumor of the Lacrimal Gland - Lacrimal Gland Benign Mixed Tumor - Pleomorphic Adenoma of Lacrimal Gland - Pleomorphic Adenoma of the Lacrimal Gland