Willems P W, van den Bergh W M, Vandertop W P
Department of Neurosurgery, University Hospital Utrecht, G03.124, PO Box 85500, NL-3508 GA, Utrecht, The Netherlands.
J Neurol Neurosurg Psychiatry. 2000 Apr;68(4):508-10. doi: 10.1136/jnnp.68.4.508.
A case of thoracic intradural extramedullary arachnoid cyst is presented in which an intramedullary low grade glioma was suspected preoperatively. The cyst was widely fenestrated and postoperatively, the patient experienced considerable improvement in her symptoms. As postoperative MRI studies also showed resolution of the intramedullary changes we regard the intramedullary changes as a result of the cyst, without the existence of primary medullary pathology. To our knowledge an arachnoid cyst, to date, has not been described as the cause of syringomyelia. As radiological findings can be misleading, extramedullary pathology, located more cranially, should be ruled out when treating cystic medullary changes.
本文报告一例胸段硬膜内髓外蛛网膜囊肿病例，术前怀疑合并髓内低级别胶质瘤。囊肿被广泛开窗，术后患者症状有显著改善。术后MRI检查也显示髓内改变消失，因此我们认为髓内改变是由囊肿引起的，不存在原发性髓内病变。据我们所知，迄今为止，尚未有蛛网膜囊肿作为空洞症病因的报道。由于影像学表现可能具有误导性，在治疗囊性髓内病变时，应排除位于更头端的髓外病变。
