Objective: To study the imaging features of color doppler flow and spiral computed tomography of small renal cell carcinoma. Method: 18 cases small renal cell carcinoma proved by pathology underwent color doppler flow imaging and helical CT scan , by enhancement CT scan during stage of renal cortex , renal parenchyma and renal pelvis. Result:All 18 cases with features of low echo in 12 cases,medium echo in 4 cases, mixed echoes of cystic and solid in 2 cases, one of the case was cystic renal cell carcinoma . 14 cases small renal cell carcinoma with a half ring signal of flow sign in side of renal hilus,2 cases with a ring signal of flow sign around the tumor; In the above all 16 cases, 1 to 2 strip-shaped on color doppler imaging artery signals in 3 cases of tumor, tumor vessels were disordered and tortured, unequal diameter in the vein exhibited lateral to renal hilus of tumor in 2 cases , There's no obvious blood flow signal in one case. While the CT features of 18 cases tumor, 10 cases were isodense,6 cases were hypodense, 2 cases with light higher density of tumors . By CT contrast enhancement scan , 10 cases were similar in enhancement degree on CT between site of tumor and renal cortex , 8 cases enhancement degree on CT in stage of renal cortex were inferior, the boundary was clear. Conclusion: The small renal cell carcinoma is mainly diagnosed by color doppler flow imaging and helical CT scan . Although the disease has obvious feature on helical CT scan ,the combined imagination can improve the accuracy of diagnosis%目的:探讨小肾癌的彩色多普勒超声、CT影像特点.方法:对我院18例经病理证实的小肾癌患者分别行彩色多普勒超声检查、螺旋CT平扫和皮质期、实质期及肾盂期增强扫描.结果:18例行超声检查,呈低回声表现12例,中等回声4例,囊实混合回声型2例,其中1例为囊性肾癌.14例小肾癌瘤周肾门侧显示半环状血流信号,2例瘤周显示环状血流信号;上述16例中,3例瘤内探及1-2条线状血流信号,2例肾门侧近肿瘤肾血管粗细不均、走行扭曲.1例瘤周和内部未探及明显血流信号.18例癌灶中,CT平扫10例等密度、6例低密度、2例稍高密度;增强扫描皮质期10例癌灶与肾皮质增强程度相近,8例癌灶皮质期增强程度低于肾皮质;实质期、肾盂期癌灶增强程度下降,肾盂期癌灶境界显示清晰.结论:彩色多普勒超声检查、CT是目前诊断小肾癌的主要手段,小肾癌的螺旋CT表现有一定特征性,尤其是"快进快退"现象,可为确定性诊断提供依据,联合应用可以提高诊断准确率.
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