Lanotte M, Massaro F, Scienza R, Faccani G
Department of Neurosurgery, C. T. O. Hospital, Torino, Italy.
Neurosurg Rev. 1994;17(3):225-7. doi: 10.1007/BF00418440.
Schwannomas of the spinal accessory nerve are rare lesions. They can be characterized by their locations as either intrajugular or intracisternal schwannomas, most of them being intrajugular. Only five cases arising in the cisterna magna are reported in literature. Clinical symptoms generally consist of 11th cranial nerve palsy associated with cerebellar signs and myelopathy. An additional case, studied by MRI, is described. The patient showed a mild cerebellar syndrome and normal pressure hydrocephalus symptoms. He was operated on and the mass completely removed with good postoperative results. The role of MRI for diagnosis of lower cranial nerve schwannomas is stressed, even though does not detect the exact nerve of origin. Total removal of these lesions is recommended, since their benign nature and unavoidable recurrence in case of partial excision.
副神经鞘瘤是一种罕见的病变。根据其位置可分为颈静脉内或脑池内神经鞘瘤，其中大多数为颈静脉内神经鞘瘤。文献中仅报道了5例发生在枕大池的病例。临床症状通常包括与小脑体征和脊髓病相关的第11对脑神经麻痹。本文描述了1例经磁共振成像（MRI）研究的病例。该患者表现为轻度小脑综合征和正常压力脑积水症状。患者接受了手术治疗，肿瘤被完全切除，术后效果良好。强调了MRI在诊断下颅神经鞘瘤中的作用，尽管它无法检测到确切的起源神经。建议完全切除这些病变，因为它们具有良性性质，部分切除时不可避免会复发。
