Vascularity of solid renal masses: role of pulsed and color doppler U.S.

ABSTRACT

The vascularity of 18 renal masses [11 malignant and 7 benign lesions] was investigated prospectively by duplex Doppler ultrasound. The results were correlated to pathologic [17/18], US [18/18] and CT findings [10/18]. With the use of a cut off peak systolic frequency of 2.5 KHz, seven of eleven malignant lesions demonstrated abnormal high frequency tumor signals [63.6% sensitivity]. Only one false positive result of a benign renal mass [inflammatory] demonstrated peak systolic frequency shifts over 2.5 KH [specificity 85.7%]. Doppler shifted signals can help in the differential diagnosis of renal masses