Metastasising pleomorphic adenoma of the submandibular salivary gland presenting with spinal cord compression: case report and review of cases with CNS involvement.

We present a very rare case of a metastasising pleomorphic adenoma with spinal cord compression and review the small handful of cases with central nervous system (CNS) involvement in the literature. This case is unusual as most other reported cases are preceded by local recurrences; also, there is only one previous case of an MPA presenting with spinal cord compression. Metastasising pleomorphic adenoma is a rare malignant salivary gland tumour which, despite "benign" histological appearances produces secondary deposits in distant sites.