目的分析原发性输尿管癌的MR 表现，探讨MR对输尿管癌的诊断价值。方 法 对11例手术病理证实的原发性输尿管 癌的MR表现进行回顾性分析。结果 MRU显 示11例原发性输尿管癌均存在梗阻水平异 常软组织占位信号影伴患侧输尿管和肾盂 不同程度积水，肿瘤T1WI呈稍低或等信 号，T2WI呈稍高信号，增强扫描呈中度至 明显强化。结论 MR联合MRU及增强扫描能 够全面准确地显示原发性输尿管癌的部 位、形态、大小范围、强化情况和周围组 织改变，对其诊断及鉴别诊断具有重要价 值。

Objective To evaluate the diagnostic value of primary ureteral carcinoma with magnetic resonance imaging (MRI). Methods Eleven pathologically confirmed patients with primary ureteral carcinoma were recruited and examined by MRI. Results The MRI images of all 11 patients appeared occupying lesion signals of abnormal ureteral obstruction with hydrosalpinx and hydronephrosis of affected side. The lesion demonstrated slightly low signal or equisignal on Toumor T1WI, and slightly high signal on T2WI; the signals were improved moderately or greatly with enhanced scan. Conclusion MRI combined with MRU and enhanced scan could fully confirm the site, feature, size and enhancement of ureteral carcinoma, and change of surrounding tissues; and play an important role of the diagnosis and differential diagnosis of ureteral carcinoma.