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对387例小脑桥角部肿瘤术后听力显著改善5例(1.3%)的病因进行研究。男1例,女4例,年龄42～61岁,平均52.2岁。组织学证实脑膜瘤和神经鞘瘤(AN)各2例,小脑成血管细胞瘤1例。自觉耳聋至手术时间为3个月至2年1个月。肿瘤12×16～28×45mm大小。术后随访时间最短2年2个月,最长15年。手术前后检查纯音听力(PTA)、语言辨别率(SDS)、耳蜗电图、ABR的变化。蜗电图采用鼓室内诱导,用1～4kHz的tone burst音刺激。5例术前平均PTA和最高SDS均大致近似高度的感音神经性聋。其中SDS严重不良为0～25%。术前成血管细胞瘤和脑膜瘤
The etiology of significantly improved 5 (1.3%) of the 387 patients with cerebellar peduncle tumors after surgery was studied. 1 males and 4 females, aged 42 to 61 years old, an average of 52.2 years old. Histologically confirmed meningioma and schwannoma (AN) in 2 cases, 1 case of cerebellar hemangioblastoma. Conscious deafness to surgery for 3 months to 2 years and 1 month. Tumor 12 × 16 ~ 28 × 45mm size. The shortest follow-up time of 2 years and 2 months and a maximum of 15 years. Preoperative and postoperative examination of pure tone hearing (PTA), language discrimination (SDS), cochlear electrogram, ABR changes. Cochlear impulses were induced in the tympanic cavity using a 1 to 4 kHz tone burst tone. 5 cases of preoperative average PTA and the highest SDS are approximately approximately the same height sensorineural deafness. Among them, SDS serious bad is 0 ~ 25%. Preoperative hemangiomas and meningioma