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作者报告了６０例经手术和病理证实的髓外硬膜下肿瘤的磁共振成像（ＭＲＩ）改变，ＭＲＩ定性诊断准确率达８６．７％。提出此类肿瘤共同的ＭＲＩ特征是：（１）脊髓受压移位；（２）蛛网膜下腔不均称；（３）硬膜外脂肪间隙受压变窄或消失；（４）髓外异常信号。定性诊断取决于肿瘤生长方式、部位、形态及信号变化，ＧＤ－ＤＴＰＡ增强更有助于微小病变及种植转移的检出。
The authors report MRI changes of 60 extramedullary subdural tumors confirmed by surgery and pathology, with a diagnostic accuracy rate of 86.7% using MRI. Common MRI features of such tumors are: (1) spinal cord compression and displacement; (2) subarachnoid asymmetry; (3) narrowing or disappearance of epidural fat space compression; (4) extramedullary Abnormal signal. Qualitative diagnosis depends on the tumor growth pattern, location, morphology and signal changes, GD-DTPA enhancement is more conducive to the detection of micro-lesions and metastasis.