【摘要】 目的 探讨脊索瘤的CT、MRI表现及分析其误诊原因。方法 回顾性分析18例脊索瘤CT、MRI图像,对术前诊断错误者进行影像分析及总结。结果 术前12例诊断正确,6例误诊。颅底部9例,骶尾部8例,颈椎1例。CT与MRI显示病灶呈圆形或类圆形12例,不规则形6例;14例边界清楚,4例边界不清。CT见膨胀性溶骨性骨质破坏,肿块呈不均匀等密度或稍低密度;9例病灶内或周边见点片状钙化或残存骨质。MRI示病灶呈等稍低T₁WI、高T₂ WI信号;CT及MRI增强后肿块呈不均匀轻中度强化。结论 脊索瘤具有一定的CT、MRI特征,CT与MRI结合对脊索瘤的定位、定量、定性诊断具有重要的价值。更多还原

【Abstract】 Objective To explore the CT and MRI features of chordoma and analysis misdiagnosis.Methods The CT and MR I imaging data were analyzed retrospectively in 18 patients with chordoma.The imaging findings of the preoperative misdiagnosed lesions were analyzed and summarized.Results 12 cases were diagnosed correctly preoperatively,6 cases were misdiagnosed.Chordoma was located in the skull base in 9 cases,in the sacrum in 8 cases,and in cervical vertebrae in 1 case.CT and MRI showed oval or round shape lesions in 12,and irregular shape in 6.14 cases of them displayed clear boundary,4 cases displayed unclear boundary.CT showed soluble osseous bone destruction and uneven isodensity or slightly low density mass.Spot or lamellar shaped calcifications or residual substances of bone were found around or inside of the lesions in 9 cases.MRI showed equal or low signal intensity on T₁ WI and high signal intensely on T₂ WI.After the CT and MRI contrast enhancement,mass showed mild-to-moderate heterogeneity enhancement.Conclusion Chordoma has certain characteristics on CT and MRI imaging.The combination use of CT and MRI scans has an important value in localization quantitative and qualitative diagnosis of chordoma.更多还原