| 청신경 종양과 기타 소뇌교각 종양에서의 청각 유발전위의 변화에 ?관한 연구 |
| 이상수, 김재우,이광우,이상복,명호진,김종성 |
| 서울대학교 신경과. 서울중앙병원 신경과. |
| Brainstem Auditory Evoked Potentials in Acoustic Neuromas and ?other Cerebellopontine Angle Tumors |
| Sang-Soo Lee,M.D., Jae-Woo Kim,M.D., Kwang-Woo Lee,M.D., Sang-Bok Lee,M.D., Ho-Jin Myung,M.D., Jong-Sung Kim,M.D. |
| Department of neurology , College of medicine, Seoul National University Department of Neurology, Asan Medical Center |
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| Abstract |
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Brainstem auditory evoked potentials(BAEP) and clinical features were studied in 12 patients with
acoustic neuromas and in10 patients with non-acoustic cerebellopontine angle(CPA) tumors. In acoustic
tumor group, BAEP fundings were characterized by poor wave formation in 3 cases, well-defined wave I
with indistinct or absent following waves in 6 cases, and prolonged interpeak latencies(lPL) in 3 cases
on the affected sides.
In non-acoustic tumor group poor wave formation in 1 case, well-defined wave I with absent following
waves in 2 cases, and prolonged IPL in 7 cases were found on the affected sides.
In each group, IPL prolongation was observed in 5 cases on the unaffected sides.
BAEP findings tend to be more often abnormal in acoustic tumors than in non-acoustic CPA tumors
Chief complaints were auditory symptoms(hearing loss or tinnitus) in 10 headache in 1 and dizziness
in 1 in acoustic tumor group: auditory symptoms in 3, headache in 2, facial sensory change in 2, facial
pain in 1, ataxia in 1 and vertigo in 1 in non-acoustic CPA tumor group
Cranial nerve involvement was VIII in 12, V un 9, IX or X in 4, VII in 2. VI in 1 and XII in 1 in
acoustic tumor group: VIII in 8, V in 9, VII in 5, IX or X in 3, II in 1. VI in 1 and XII in 1 in non-
acoustic CPA tumor group.
Increased DTR in 2 and cerebellar dysfunction in 9 were found in acoustic tumor group and in 3, 7
respectively in non-acoustic CPA tumor group.
There was electrophysiological improvement in postoperative BAEPs in 3 cases. The postoperative
BAEP study mightbhe the good tool of follow-up. |
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