Parotid Gland Tumours — Practice

A 58-year-old man presents with a 4-month history of a painless, slowly enlarging mass in the tail of the left parotid. A clinical photograph would show a smooth firm swelling lifting the ear lobule, and on bimanual palpation it is mobile with intact facial nerve function. Fine-needle aspiration shows epithelial cells in a chondromyxoid stroma. What is the most likely diagnosis?