The CT quantitative analysis between renal angiomyolipoma with minimal fat and clear cell renal cell carcinoma
10.3969/j.issn.1002-1671.2017.11.018
- VernacularTitle:乏脂肪型肾血管平滑肌脂肪瘤与肾透明细胞癌的CT定量分析
- Author:
Yanqing MA
1
;
Fang CAO
;
Zheng GUAN
Author Information
1. 浙江省人民医院杭州医学院附属人民医院放射科
- Keywords:
renal tumor;
renal angiomyolipoma;
clear cell renal cell carcinoma;
computed tomography
- From:
Journal of Practical Radiology
2017;33(11):1717-1720
- CountryChina
- Language:Chinese
-
Abstract:
Objective To differentiate the renal angiomyolipoma with minimal fat (mf-RAML) from clear cell renal cell carcinoma (ccRCC) by Logistic regression analysis and CT quantitative analysis.Methods 25 patients with mf-RAML and 62 patients with ccRCC were collected and performed with enhanced CT scan.The CT signs,CT attenuation value and CT relative attenuation value were calculated and recorded.Results Pseudocapsule and enhancement pattern (OR=0.061,7.445,P=0.005,0.034) were the independent variables of Logistic regression equation.There were statistical difference between the unenhanced muscle％,CT relative attenuation value in renal cortical phase,CT attenuation value and CT relative attenuation value in renal medulla phase and CT relative attenuation value of the mf-RAML and those of the ccRCC (P =0.000-0.040).In addition,the two diseases had low positive correlation with the unenhanced muscle％ and CT attenuation value and CT relative attenuation value in renal medulla phase (r =0.221-0.343,P =0.001-0.040),and had low to middle negative correlation with CT relative attenuation value in renal cortical phase (r =-0.512,-0.225,P =0.000,0.036).The areas under the ROC curve of unenhanced muscle％ and CT relative attenuation value in renal medulla phase were relatively high (0.665-0.753).Conclusion Pseudocapsule and enhancement pattern were independent factors in differentiating mf-RAML from ccRCC.The CT attenuation value of the mf-RAML was similar to the erector spinae muscle.The enhanced degree of mf-RAML in renal cortical phase was lower than that of the ccRCC,while the reduced degree of the ccRCC was higher than that of the mf-RAML in renal medulla phase.The unenhanced muscle％ and the CT relative attenuation value in renal medulla phase are of great significance in diagnosing mf-RAML and ccRCC,especially the unenhanced muscle％.
