Study on diagnostic value of renal tumors by real-time contrast-enhanced ultrasonography

Objective To evaluate the application of real-time contrast-enhanced ultrasongraphy(CEUS) in the diagnosis and differential diagnosis of renal masses.Methods CEUS was performed in 65 cases of renal tumors which were detected by conventional color Doppler ultrasongraphy.The features of renal tumors on CEUS were analyzed and compared with those of pathology.Results Of the 65 cases,41 were malignant and 24 were benign.The accuracy,sensitivity and specificity were 80.0%(52/65),87.8%(36/41),and 66.7%(16/24) for conventional color Doppler flow imaging,and 93.8%(61/65),97.6%(40/41),87.5%(21/24) for CEUS,respectively.The contrast-enhanced ultrasound of renal cell carcinoma showed a fast-in and fast-out model,and high and symmetric enhancement;most of renal angiomyolipoma showed a slowly-in and slowly-out model,and low and uniform enhancement.Conclusions Ultrasound contrast improved the diagnostic accuracy,and had important value in the diagnosis and differential diagnosis of benign and malignant renal masses.