Polyp of the external ear canal arising from the temporomandibular joint: a case report.

A polypoid mass of granulation tissue in the external auditory meatus was found to be arising from the ipsilateral temporomandibular joint (TMJ). The origin of the lesion was suspected clinically and was confirmed by a CT scan study. As the patient showed signs of psoriatic arthritis, it seems likely that this was the underlying pathological process in the joint. A patent foramen of Huschke allowed herniation of synovial tissue from the joint into the external auditory canal.