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目的:提高椎管内肿瘤MRI诊断的正确性。方法:回顾分析4例经手术病理证实为椎管内罕见肿瘤的MRI表现,包括髓外硬膜下间胚叶性软骨肉瘤与少枝胶质细胞瘤、髓内恶性黑色素瘤与神经鞘瘤。结果:MRI检查能显示椎管内肿瘤的确切部位、大小及与邻近组织的关系,某些肿瘤虽然罕见,但仍有一些影像特点,如黑色素瘤典型MRI表现为T_1WI高信号、T_2WI低信号。结论:根据肿瘤在MRI上的特征性表现,可对某些椎管内罕见肿瘤作出定性诊断。
Objective: To improve the accuracy of MRI diagnosis of spinal canal tumor. Methods: MRI findings of 4 cases of rare intracranial tumors confirmed by surgery and pathology were retrospectively analyzed. These included extramedullary prominocytosis, oligodendroglioma, intramedullary malignant melanoma and schwannoma. Results: The MRI examination showed the exact location and size of the tumor in the spinal canal and the relationship with the adjacent tissues. Although some tumors were rare, some imaging features were still present. For example, the typical MRI of melanoma showed high T_1WI signal and low T_2WI signal. Conclusion: According to the characteristic features of tumors in MRI, some rare tumors in the spinal canal can be diagnosed qualitatively.