上顎癌頭蓋内浸潤例の側頭骨病理所見

抄録

Temporal bone was examined in 44-year-old woman with intracranial infiltration of squamous cell carcinoma of the right maxillary sinus. She experienced a left hypoglossal paralysis about 19 months after the partial maxillectomy. She then complained of dizziness and left tinnitus. The pure tone audiometry showed moderate combined deafness on the left ear. The caloric test was severe canal paresis in the left ear. Left temporal bone findings: There was tumor invasion in the pyramid. The bony labyrinthine capsule and VIIIth nerve were not infiltrated with tumor cells. Blood was seen both in the endolymphatic and perilymphatic spaces of the cochlea, vestibule and semicircular canals. Tissue bleeding was observed in spiral ligament and modiolus. Reissner's membrane was distended.