Dyck P
Bull Los Angeles Neurol Soc. 1977 Mar;42(1):8-15.
Large cerebellopontine angle tumors distort and displace the brain stem. Two cases are reported in which ipsilateral hemiparesis ensued postoperatively. Compression of the contralateral cerebral peduncle against the free edge of the tentorium cerebelli appears to be the mechanism leading to this mesencephalic dysfunction. Review of the literature failed to reveal a discussion of this mechanism of brain stem injury. Extension of tumor through the tentorial hiatus appears to make the mesencephalon particularly vulnerable. Incision of the tentorium prior to removal of a tumor when it invades the incisural hiatus may have merit.
大型桥小脑角肿瘤会使脑干变形并移位。本文报告了两例术后出现同侧偏瘫的病例。对侧大脑脚被小脑幕游离缘压迫似乎是导致这种中脑功能障碍的机制。文献回顾未能发现关于这种脑干损伤机制的讨论。肿瘤经小脑幕裂孔扩展似乎使中脑特别容易受到影响。当肿瘤侵犯小脑幕裂孔时，在切除肿瘤前切开小脑幕可能是有价值的。
