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目的:分析中枢神经系统黑色素瘤的MRI影像特征。材料和方法:10例中枢神经系统黑色素瘤患者,其中男女各5例,年龄11～59岁。9例病灶位于颅内,其中3例有皮肤黑色素瘤切除史;1例位于颈髓。10例全部行MRI检查,其中4例增强MRI扫描,2例CT平扫。结果:9例MRI均表现为不均-短T_1、短T_2信号,并在T_2WI可见低信号肿块影,另1例显示不均一长T_1短T_2信号。4例为不均一明显强化,其中1例沿软脑膜转移;2例CT平扫为血肿密度。结论:MRI显示黑色素瘤具有特征性,显示脑膜浸润的范围和程度优于CT。
Objective: To analyze MRI features of central nervous system melanoma. Materials and Methods: Ten patients with central nervous system melanoma, including 5 males and 5 females, aged from 11 to 59 years old. Nine lesions were located in the cranium, of which three had a history of cutaneous melanoma; one was located in the cervical cord. All 10 patients underwent MRI examination, including 4 enhanced MRI scan and 2 CT scan. Results: All 9 cases showed non - uniform short - T 1 and short T 2 signals. The low signal mass was seen on T 2 WI and the other showed non - uniform long T 1 short T 2 signals. 4 cases of non-uniform significant enhancement, including 1 case of metastasis along the pia mater; 2 cases of CT scan hematoma density. Conclusion: MRI showed characteristic features of melanoma, showing that the extent and extent of meningeal invasion is superior to CT.