抄録
A 46 year-old male was first seen with a complaint of a left progressive hearing loss, facial weakness, hoarseness, and swallowing difficulty. Physical and radiological examinations revealed a space occupying lesion involving the petrous part of the temporal bone and infratemporal fossa on the left side. After subtotal removal of the lesion, which was done by the neurosurgeons, a diagnosis of chondrosarcoma invading the left temporal bone with multiple involvement of the lower cranial nerves was made.
In the area of head and neck, particulary in the temporal bone, chondrosarcoma is extremely rare. There are only 6 case reports of the tumor in the Japanese literature including our case. Since the tumor occurs infrequently and is usually located in an inaccessible region of the skull, it is usually diagnosed after the tumor reaches considerable size and causes multiple cranial nerve deficits or intracranial complications.