1995 年 54 巻 5 号 p. 476-480
Twenty-six patients with cerebellopontine epidermoid tumor underwent radical surgical resection between 1985 and 1992 in Mitsui Memorial Hospital. Tokyo.
The average age was 46.1 years and the male to female ratio was 1 : 1.36. Common clinical manifestations included trigeminal pain, facial hypesthesia, dizziness and tinnitus. Predominant signs were cranial nerve palsies and cerebellar impairment. Pure tone threshold was stored comparatively, but there was a significant difference between the unaffected and affected side in high tones (4.000 Hz, 8.000 Hz).
The maximal discrimination score was within the normal range, but all results showed retrocochlear findings in ABR. Three patients presented spontaneous nystagmus, four had dysmetria. Caloric test results were comparated. Anatomical site and growth of the tumors was discussed.