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目的 探讨脑内神经元及神经元神经胶质混合性肿瘤的MRI表现。方法 结合复习文献 ,尝试对 31例经手术病理证实的脑内神经元及神经元神经胶质混合性肿瘤病例的MRI影像学特点进行分析。MRI检查采用GESigna扫描机。 31例病理结果 ,神经节胶质瘤 11例 ,中枢神经细胞瘤 15例 ,神经节细胞瘤 3例 ,小脑发育不良性节细胞瘤 2例。结果 神经节胶质瘤MRI表现T1加权像为低信号囊性团快 ,T2加权像均为高信号。局部灰白质界限不清。注射Gd DTPA后 ,囊壁及结节增强为主。中枢神经细胞瘤MRI可见T1WI呈不均匀等信号团块混杂有低信号 ,T2WI:部分为等信号 ,部分为高信号。注射Gd DTPA :表现为非均匀增强。神经节细胞瘤MRI表现质子密度像或T2WI为等或稍高信号。T1WI为低信号。小脑发育不良性节细胞瘤MRI显像可见病变在T1WI为黑色 ,而在T2WI为白色 ,注射造影剂后无增强。病灶条纹状 ,边界清楚 ,无水肿。结论 神经元及神经元胶质混合性肿瘤为一类较少见的神经系统肿瘤 ,其最终诊断仍取决于组织学。但该类肿瘤的影像学表现中部分病例具有一定特点。根据这些特点 ,结合临床表现 ,有益于在术前做出正确诊断。
Objective To investigate the MRI findings of neuronal and neuronal glial mixed tumors in the brain. Methods Combined with reviewing the literature, we attempted to analyze the MRI features of 31 cases of brain neurons and neuronal glioma mixed tumor confirmed by surgery and pathology. MRI inspection using GESigna scanner. 31 cases of pathological findings, ganglion glioma in 11 cases, 15 cases of central neurocytoma, ganglioneuroma in 3 cases, cerebellar dysplastic cholesteatoma in 2 cases. Results The T1 weighted images of neuroglial glioma showed low signal cystic mass and high T2 signal. Local gray-white boundary is unclear. Gd DTPA injection, the capsule wall and nodules enhanced mainly. MRI of central neurocytoma showed uneven signal intensity of T1WI mixed with low signal, T2WI: part of the equal signal, part of the high signal. Gd DTPA injection: manifested as non-uniform enhancement. Neuroblastoma MRI imaging performance of proton density or T2WI equal or slightly higher signal. T1WI is low signal. Cerebellar dysplastic cholesteatoma MRI imaging showed that the lesions were black at T1WI and white at T2WI with no enhancement after injection of contrast agent. Striped lesions, clear boundaries, no edema. Conclusion Neuronal and neuronal glial mixed tumors are a rare class of nervous system tumors, the final diagnosis still depends on the histology. However, some imaging features of such tumors have some characteristics. According to these characteristics, combined with clinical manifestations, is conducive to make the correct diagnosis before surgery.