| 王霄英,范诒忠,梁妍,崔爱国,蒋学祥.小肾癌的MR表现[J].中国医学影像技术,2004,20(8):1223~1225 |
| 小肾癌的MR表现 |
| MR diagnosis of small renal cell carcinoma |
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| DOI： |
| 中文关键词: 肾癌 磁共振成像 |
| 英文关键词:Renal cancer Magnetic resonance imaging |
| 基金项目: |
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| 摘要点击次数: 1845 |
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| 中文摘要: |
| 目的 研究小肾癌(直径<3 cm)的MR表现。方法 19例手术病理证实的小肾癌患者,肿瘤直径均<3 cm,术前1个月内行MR检查,将手术病理结果与MR表现进行对照研究。结果 19例患者均被MR检出,14例边界清楚,5例部分边界不清。MR假包膜显示率为85.71%(12/14)。平扫信号无特征性。6例MR增强扫描中,2例不均匀强化,其增强程度低于肾实质;2例未见明显强化;2例为囊性,增强后囊壁及分隔有强化。MR分期诊断准确率为78.94%(15/19)。结论 MR可显示小肾癌的边界和信号特点,有助于小肾癌的检出和分期诊断。 |
| 英文摘要: |
| Objective To evaluate the MR appearances of small renal cell carcinoma (sRCC) (<3 cm). Methods Nineteen patients with pathologically proved sRCCs were examined by MR within 1 month before surgery of nephrectomy. The MR appearances and pathological results were studied. Results All sRCCs were detected in MR images. Forteen sRCCs were clearly defined and 5 were not. Forteen sRCCs had pseudocapsule pathologically, and the demonstration rate of sRCC was 85.71% (12/14) with MR. Signal intensities of sRCC were as following: low T1 and high T2 signal in 4, intermediate T1 and slightly high T2 signal in 3, intermediate T1 and slightly low T2 signal in 3, slightly high T1 and slightly high T2 signal in 2, slightly high T1 and low T2 in 1, cystic signal in 2 and inhomogeneous signal in 4. After intravenous administration of contrast media, the signal intensities of the lesions were as following: 2 were inhomogeneously enhanced but less than that of the normal renal cortex; 2 were not enhanced obviously; 2 cysts were enhanced in the regions of the cystic wall and the septum. According to the surgical results, 12 cases were stage Ⅰ, 6 were stage Ⅱ and 1 was stage Ⅲ. The accuracy rate of MR in staging of sRCCs was 78.94% (15/19). Conclusion MR is helpful in the detection and staging of sRCCs. |
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