三叉神経鞘腫の2例:神経耳科学的考察

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Symptomatologic and neurological features of two cases of trigeminal neurinoma are reported.<BR>Case 1. A 22-year-old male, complained of left facial disturbance and hypogeusia. Neurological examination revealed damage of the Vth cranical nerve. Cerebellar symptoms were noted. His functional examination of equilibrium showed Bruns nystagmus, direction changing positional nystagmus, saccadic pattern on ETT, hyporesponse on OKP and OKAN, and positive visual supression test. Enhanced CT scan disclosed a mass in the left cerebellopontine angle region. The cystic mass was removed by the subtemporal approach, and diagnosed as trigeminal neurinoma.<BR>Case 2. A 36-year-old female had difficulty in walking. Neurolog i cal examination reveraled damage of the Vth cranical nerve. Cerebellar symptoms were noted. Her functional examination of equilibrium showed right spontaneous nystagmus, Bruns nystagmus, direction changing positional nystagmus, saccadic pattern on ETT, hyporesponse on OKP and OKAN, and positive left visual supression test. Enhanced CT scan disclosed a ring enhanced mass in the left cerebellopontine angle region. The cystic mass located at the posterior fossa was removed by the left retromastoid suboccipital approach, and diagnosed as trigeminal neurinoma.
耳鼻咽喉科臨床学会の論文