1. Department of Ultrasound, the 302nd Hospital of PLA, Beijing 100039, China; 2. Department of Ultrasound, the PLA General Hospital, Beijing 100853, China; 3. Department of Ultrasound, Qingdao Municipal Hospital, Qingdao Shandong 266071, China
Abstract：Objective: To evaluate the value of contrast-enhanced ultrasound in differential diagnosis of renal occupied lesions. Methods: Thirty-one renal occupied lesions underwent conventional and contrast-enhanced ultrasound examinations with a bolus injection of SonoVue. The perfusion characteristic of ultrasound contrast agent was assessed and the results were compared with that of pathology. Results: The renal occupied lesions included 17 malignant lesions and 14 benign lesions. Enhancement patterns of contrast-enhanced ultrasound were showed in 11 malignant renal lesions characterized by fast washing-in and fast washing-out. The perfusion characteristic of benign renal lesions was slow(or simultaneously) washing-out. There were no perfusions of contrast agent during the whole procedure in the 3 cases of renal atypical cyst. Conclusion: The contrast-enhanced ultrasound is valuable in differenting benign and malignant renal occupied lesions.
2009, Vol. 20 
