Graça J, Gültasli N, D'Haene N, Brotchi J, Salmon I, Balériaux D
Department of Neuroradiology, Erasme University Hospital, Brussels, Belgium.
AJNR Am J Neuroradiol. 2006 Apr;27(4):818-21.
Intradural extramedullary location of ependymoma is rare. To the best of our knowledge, only 9 cases have been described in the literature. We report a case of a histologically confirmed ependymoma (WHO grade II) presented in the MR imaging as a cystic, nonenhancing thoracic intradural extramedullary lesion compressing the spinal cord. The cystic appearance mimicking an arachnoid cyst at diagnosis and the leptomeningeal dissemination developed later were peculiarities that have never been previously described in relation to these rare tumors.
室管膜瘤位于硬膜内髓外的情况较为罕见。据我们所知，文献中仅描述过9例。我们报告一例经组织学确诊的室管膜瘤（世界卫生组织二级），磁共振成像显示为囊性、无强化的胸段硬膜内髓外病变，压迫脊髓。诊断时囊性表现类似蛛网膜囊肿，且后期出现软脑膜播散，这些特征此前从未在这些罕见肿瘤中被描述过。
