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目的:探讨椎管内神经纤维瘤的MR特征。方法:回顾性分析17例19个经手术病理证实且资料完整的椎管内神经纤维瘤MR表现。结果:19个肿瘤中15个为孤立的神经纤维瘤,MR图像上边界清楚;4个丛状神经纤维瘤,MR图像上整个或部分边界模糊。全部肿瘤T1WI为等-稍高或稍低信号,T2WI为多样的高信号,17个为不均匀的T2加权高信号,其中12个显示中央低信号,周围高信号的“靶征”。增强扫描,呈多样的强化,其中11个显示中央强化。结论:T1WI等-稍高或稍低信号,T2WI多样的高信号,“靶征”是椎管内神经纤维瘤的特征,肿瘤呈多样的强化,常显示中央强化。边界模糊时,应考虑丛状神经纤维瘤。
Objective: To investigate the MR features of spinal neurofibroma. Methods: A retrospective analysis of 17 cases of 19 pathologically confirmed and data complete spinal neurofibroma MR findings. Results: Fifteen of the 19 tumors were isolated neurofibromas, and the upper boundary of MR images was clear. The four plexiform neurofibromas had fuzzy boundaries of whole or part of MR images. The T1WI of all tumors was equal-slightly higher or lower, T2WI was highly variable, and 17 were non-uniform T2-weighted high signals. Twelve of them showed the “target signs” of central low signal and peripheral high signal. Enhanced scanning, was a variety of enhanced, of which 11 showed the central strengthening. Conclusion: T1WI and so on - slightly higher or lower signal, T2WI diverse high signal, “target sign” is a characteristic of spinal neurofibroma, the tumor was a variety of enhanced, often showed the central enhancement. When the border is blurred, plexiform neurofibroma should be considered.