少脂肪肾血管平滑肌脂肪瘤与小肾癌的CT鉴别诊断

CT Differential Diagnosis of Minimal Fat Renal Angiomyolipoma and Small Renal Cell Carcinoma

目的探讨少脂肪肾血管平滑肌脂肪瘤(RAML)与小肾癌(SRCC)的CT鉴别诊断征象,以提高少脂肪RAML的诊断水平。资料与方法回顾性分析经手术病理证实的28例少脂肪RAML及34例SRCC的CT平扫及三期动态增强扫描的影像学资料,对各项CT观察指标进行统计学分析。结果病灶的单发及多发、与肾皮质的交角、钙化以及动态增强扫描表现等4项CT观察指标在少脂肪RAML与SRCC组中的差异有统计学意义(P<0.05)。结论病灶的单发或多发、与肾皮质的交角、钙化及动态增强扫描表现对两者的鉴别诊断有重要价值。

Objective To improve the diagnostic accuracy of minimal fat renal angiomyolipoma （RAML） by investigating the CT features of minimal fat renal angiomyolipoma （RAML） and small renal cell Carcinoma （SRCC）. Methods and Methods The imaging data of plain CT scan and dual-phase contrast-enhanced CT scan of 28cases of minimal fat RAML and 34 cases of SRCC which confirmed by pathology were retrospectively analyzed. The CT features would be analysed statistically. Results Four indexes were found to be significant and evident for differentiating RAML absent of fat from SRCC, which were single or multiple, angle with cortex, calcification,dynamic intensification （P〈0.05）. Conclusion The single or multiple, angle with cortex, calcification,dynamic intensification are valued in the differentiation of RMAL absent of fat and SRCC.