Hi, My father who is 65 years old, today he got the ultrasound done of his kidney. The report says both the kidneys are normal in position,size with increased cortical echogenicity. Echogenetic solid mass lesion is noted in the left renal pelvis wit irregular cauliflower outer margin encasing the aorta ,IVC,Left Renal Artery measuring 152*118*136mm. Whats does this mean???