The patient went on to have a resection.

Histology:

The sections show a pleomorphic adenoma composed of confluent cords, nests and rare ducts lined by small discrete spindle cells and cuboidal cells devoid of nuclear atypia. The stroma appears myxoid with focal evidence of benign cartilage formation. Focally there is also squamous metaplasia. In areas at the periphery of the lesion there is a paucicellular fibrous capsule of varying thickness. A small amount of unremarkable salivary tissue is present at one edge of one fragment.

FINAL DIAGNOSIS: pleomorphic adenoma.