Concurrent primary Hodgkin's lymphoma and recurrent pleomorphic adenoma of the ipsilateral parotid gland: report of a rare case.

The synchronous occurrence of two histologically different and morphologically distinct tumours in a single parotid gland is an exceptionally rare and probably coincidental event. We have recently experienced such a case initially suspected of being a recurrent pleomorphic adenoma. Superficial parotidectomy, however, revealed two separate masses. Postoperative histopathological examination diagnosed the presence of a pleomorphic adenoma with a concurrent primary parotid gland Hodgkin's lymphoma arising from an intraglandular lymph node. The management of this case is presented along with a brief review of the literature concerning the evaluation and management of this rare entity.