Abstract:Objective To investigate the application value of qualitative and quantitative contrast-enhanced ultrasound in differentiating benign and malignant renal tumors. Methods A total of 59 patients with renal parenchymal space occupying confirmed by surgery and pathology from January 2017 to March 2019 were selected as the research objects.All patients underwent contrast-enhanced ultrasound (CEUS) before operation.The differences between qualitative and quantitative parameters of CEUS were compared and analyzed, and the value of CEUS in differentiating benign and malignant renal lesions was discussed. Results There were 47 cases of renal malignant tumors (42 cases of clear cell carcinoma, 3 cases of chromophobe cell carcinoma, 2 cases of papillary cell carcinoma), 12 cases of benign renal tumors, all of them were angiomyolipoma.The peak uneven enhancement was significantly higher in renal malignant tumors than in benign renal tumors (44.68% vs 8.33%, P=0.022).The rise time and time to peak of renal malignant tumor were significantly lower than those of benign renal tumor, while the peak intensity (IMAX) of renal malignant tumor was significantly higher than that of renal benign tumor (P<0.05, P<0.01). Conclusion The qualitative and quantitative techniques of contrast-enhanced ultrasound have high clinical application value in differentiating benign and malignant renal tumors.