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Ⅰ.はじめに
Solitary fibrous tumor(SFT)は間葉系細胞由来とされる腫瘍であるが,頭蓋内に発生することは極めて稀である.しかし近年,その報告例は増加しており,2000年のWHO分類において,tumorof meninges,mesenchymal non-meningothelial tu-morsの1つに分類された12).われわれは,第4脳室内に発生したSFTの1例を経験したので,文献的考察を加え報告する.
A rare case of solitary fibrous tumor, located wholly within the fourth ventricle, is reported. A 57-year-old male presented with headache and nausea. The preoperative magnetic resonance images revealed a well circumscribed mass in the fourth ventricle that exhibited a low intensity on T1-weighted images and homogeneously enhanced with gadolinium. Vertebral angiogram revealed a tumor stain supplied from the choroidal branches of the posterior infe-rior cerebellar artery. The tumor was totally resected through a midline suboccipital approach.
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