三叉神经瘤占颅内肿瘤的0.2%-1%。起源于三叉神经髓鞘的神经膜细胞,常见囊性变和出血坏死,有包膜,属脑外肿瘤。它①起源于三叉神经半月节,居颅中窝的硬膜外,生长缓慢,可向海绵窦及眶上裂扩展。②起源于三叉神经根,居颅后窝的硬膜内,可侵犯周围脑神经,约25%的三叉神经瘤可位于颞骨岩部尖端,跨越颅中窝、颅后窝的硬膜内外。
目的:探讨CT在三叉神经瘤诊断中的价值。
Objective:To assess the diagnostic value of CT in the diagnosis of trigeminoma.
三叉神经瘤表现为特征性哑铃形伴岩骨尖骨质破坏。
The characteristic trigeminoma appeared as dumb bell with erosion of petrous bone.
材料与方法:选择13例经手术和病理证实的三叉神经纤维瘤病人的X光手片、CT、MR分析其影像学改变。
Materials and methods: This paper chose 13 cases of trigeminal neurinoma verified by operation and pathology. The significance of the X-ray, CT and MR was analysed.
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