Fig. 4

A solid tumor of the right kidney A ultrasound imaging, isoechoic mass with unclear boundary, regular shape, and inhomogeneous internal echo, with hypoecho and echoless area and small fluid area B SMI the growth from the periphery to the interior was tortuous and disorderly, with multiple branching vessels, and the vascular architecture was type V C MFI images showed the tortuous and disorderly growth of multi-branched vessels from the periphery to the interior. The vascular architecture was type V. Pathological results showed clear cell renal cell carcinoma