CT Differential Diagnosis of Fat-Poor Renal Angiomyolipoma and Non-clear Cell Renal Cell Carcinoma
Objective To investigate the CT differential diagnosis of fat-poor renal angiomyolipoma and non-clear cell renal cell carcinoma with maximum diameter＜4cm.Methods We retrospectively analyzed the CT morphological characteristics,plain scan and enhanced features of small renal mass,including 33 patients with fp-AML,22 patients with PRCC and 19 patients with ChRCC confirmed by pathology.Results The maximum tumor diameter of fp-AML was smaller than that of PRCC and ChRCC with statistical significance(P＜0.05).The incidence of angular interface and high density in fp-AML were higher than PRCC and ChRCC(P＜0.05).fp-AML was higher than PRCC and ChRCC in CT value of unenhanced and each enhanced phase,absolute enhanced CT value of tumor in corticomedullary and nephrographic phases,the corticomedullary phase enhancement rate and enhancement degree,with statistical significance(P＜0.05).There were no statistical difference among fp-AML,PRCC and ChRCC in density uniformity,calcification,cystic necrosis,location of the tumor center,overflowing beer sign,and enhancement pattern(P＞0.05).Conclusion The maximum tumor diameter,angular interface,high density and tumor enhancement characteristics are helpful to distinguish fp-AML with diameter＜4cm from non-clear cell RCC.
NETL
NSTL
万方数据
维普
