Man 37 yo, screening by MSCT total body non CE detected abnormal border of upper pole of right kidney (images CT 1, CT 2).
Phased CT CE find out this mass being tumor of upper pole of right kidney, size of3,5 cm with the rim border but non fatty tissue in structure (CT 3, CT4).
Ultrasound for verifying of this mass is mixed echoic, hypovascular supplying, not invasion to hilus of right kidney (US 1, US 2( longitudinal scanning), US 3 (cross-section).
What is your suggestion of diagnosis, and biopsy or not?