A VERY RARE CASE OF MIDDLE EAR TERATOMA

Abstract

Teratomas are tumors consisting of tissue arising fromall three embryonic germ layers. The most common locations for teratomas include the sacrococcygeal region and the gonads. Teratomas of the head and neck are uncommon, and the case of teratoma arising from the middle ear or eustachian tube is very rare. A very rare case. of middle ear teratoma presenting in an 6-year-old male is reported. Main complaints were continuous otorrhea and hearing loss of the right ear. We found the tumor existed from the middle ear to external ear canal through the perforation of the tympanic membrane and suspected the tumor to be inflammatory granulation or benign tumor. At the operation, we found the tumor invaded into the eustachian tube and came into contact with the internal carotid artery. So it was possible that complete resection was not performed. Pathological diagnosis was mature teratoma. We thought that it was necessary to follow up for long period because of possibility of recurrence.