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目的：根据椎管内肿瘤的ＭＲＩ表现和病理基础，对肿瘤定位、定性和鉴别诊断进行探讨。材料与方法：选择８４例经手术病理证实的椎管内肿瘤，观察肿瘤形态、边界、ＭＲＩ信号特征、强化程度及与周围脊髓、硬膜囊、椎体附件的关系。结果：髓内肿瘤以脊髓径线增大为主，其中室管膜瘤以瘤体内空洞和周边含铁血黄素沉着所致低信号线为其特征，髓外硬膜下肿瘤有硬膜下征改变，神经鞘瘤较易形成囊变和椎管外侵犯。硬膜外肿瘤多有硬膜外征表现，转移瘤破坏椎体和附件，但不累及椎间盘。结论：椎管内肿瘤均有自己一定的特征性ＭＲＩ表现，并可在病理学上找到依据，ＭＲＩ检查具有重要的定位和定性诊断价值。
OBJECTIVE: To investigate the localization, qualitative and differential diagnosis of tumor based on the MRI findings and pathology of the tumor in the spinal canal. MATERIALS AND METHODS: Eighty-four cases of spinal canal tumors confirmed by surgery and pathology were selected. The morphological features, borderline, features of MRI signals, degree of enhancement and the relationship with the surrounding spinal cord, dural sac and vertebral bodies were observed. Results: The intramedullary tumors were mainly enlarged by the diameter of the spinal cord. Among them, ependymoma was characterized by the low signal line caused by cavity and peripheral hemosiderosis in the tumor, extradural subdural tumor with subdural sign Change, schwannoma more likely to form cystic and extracapsial invasion. Epidural tumors and more epidural symptoms, metastases destroy vertebral bodies and attachments, but does not involve the disc. Conclusion: The intraspinal tumors have their own characteristic MRI manifestations, and can be found in the pathology, MRI examination has important positioning and qualitative diagnostic value.