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目的:分析肾盂癌的MRI信号特点。方法:搜集有完整临床资料及经病理证实的肾盂癌32例,均作T1WI、T2WI、STIR序列检查,其中15例作MRI动态增强检查,层厚/间距:8/0mm。必要时为4/0mm。结果:移形上皮细胞癌28例,鳞状上皮细胞癌3例,腺癌1例。T1WI均匀低信号21例,混杂信号7例,均匀等信号4例。T2WI均匀高信号20例,混杂高信号7例,等信号5例。腹膜后淋巴结转移5例,肾门淋巴结转移2例。注入对比剂后,皮质期均匀强化10例,不均匀强化5例;实质期及肾盂期13例病灶强化程度几乎没有改变,2例增强程度明显提高。MRU,肾盏饱满积水6例,肾盂积水扩张4例,肾盂内充盈缺损影3例。结论:仔细分析病灶信号特点,MRI能够准确诊断肾盂癌且能了解向肾实质及远处转移情况。
Objective: To analyze the MRI signal characteristics of renal pelvis cancer. Methods: Thirty-two cases of renal pelvic carcinoma with complete clinical data and pathological evidence were collected. All of them were examined by T1WI, T2WI and STIR. Among them, 15 cases were examined by dynamic contrast enhancement (MRI) with thickness / space of 8 / 0mm. If necessary, 4 / 0mm. Results: There were 28 cases of transitional cell carcinoma, 3 cases of squamous cell carcinoma and 1 case of adenocarcinoma. T1WI uniform low signal in 21 cases, mixed signal in 7 cases, uniform signal in 4 cases. T2WI uniform high signal in 20 cases, mixed high signal in 7 cases, and other signals in 5 cases. Retroperitoneal lymph node metastasis in 5 cases, 2 cases of renal cell lymph node metastasis. After injection of contrast agent, 10 cases were homogeneously enhanced in cortical phase and 5 cases were non-uniformly enhanced. There was almost no change in the extent of enhancement in 13 cases in puberty and in renal pelvis, and enhancement in 2 cases was significantly improved. MRU, calyx full of water in 6 cases, 4 cases of hydronephrosis, renal pelvis filling defect in 3 cases. Conclusion: Careful analysis of the characteristics of the lesion signal can accurately diagnose renal pelvic cancer and understand the parenchymal and distant metastases.