Differentiation of renal benign mass and renal cell carcinoma by multislice computed tomography
10.3760/cma.j.issn.1008-6706.2012.05.032
- VernacularTitle:肾脏不典型良性肿块与肾癌的多层螺旋CT鉴别诊断
- Author:
Li ZHANG
;
Lingrong PENG
;
Jun YANG
;
Hong LIAO
- Publication Type:Journal Article
- Keywords:
Kidney neoplasm;
Differentiation;
Carcinoma,renal cell;
Tomography,X-ray computed
- From:
Chinese Journal of Primary Medicine and Pharmacy
2012;19(5):709-711
- CountryChina
- Language:Chinese
-
Abstract:
Objective To improve the level of diagnosis and differentiation of renal benign mass with renal cell carcinoma(RCC),so as to lower the misdiagnosis rate.Methods This study included 9 cases of benign renal mass,whose age ranged from 30 to 76 years with a mean of 54 years and included 52 patients with RCC.Three subtypes of RCC were noted,including clear cell in 37 cases,papillary RCC in 10 cases and chromophobe RCC in 5 cases.Plain scan and three phase CT(corticomedullary,nephrographic and excretory phases)were done in all patients.The CT features of RCC and benign mass were compared.Results All the cases were underwent radical nephrectomy as RCC,while they were postoperatively diagnosed as benign renal mass.There were 4 cases of angiomyolipoma (AML)with minimal fat,two cases of oncocytoma,one case of leiomyoma,one case of inflammatory pseudotumor,and one case of cyst with hematoma and organization.Fifty-two cases of RCC showed homogenous or inhomogeous,equal,slightly lower,slightly higher or mixed density on unenhanced scan,inhomogenous obvious enhancement after administration of contrast media.And the most obviously enhanced portion of renal carcinomas were isodense or slightly hyperdense relative to adjacent renal cortex in corticomedullary phase.Conclusion CT is an important radiologic approach to diagnose and differentially diagnose malignant or benign kidney mass.For those patients with benign mass that is not a typical case on radiology,the preoperative needle biopsy or intraoperative frozen section pathological diagnosis is the key to avoid misdiagnose and mistake resection of the kidney,and choose the proper treatment approach to avoid unnecessary kidney radical resection.
