81-year-old male with new onset renal failure. Evaluate perfusion to kidneys. RIGHT KIDNEY: Status post partial nephrectomy compared to the previous ultrasound examination. Normal cortical echogenicity and corticomedullary differentiation. The longest dimension measures 12.2 cm. No calculus, hydronephrosis, or other evidence of obstruction.Right lower pole hypoechoic lesion measuring 0.9 x 0.7 x 1.0 cm and demonstrates a possible blood vessel coursing at the periphery; this lesion corresponds to a hyperdense cyst measuring 55 Hounsfield units on the CT 6/10/2015 (series 4, image 56).LEFT KIDNEY: Normal cortical echogenicity and corticomedullary differentiation. The longest dimension measures 15.6 cm. There are multiple hypoechoic lesions in the left kidney with the largest measuring 4.1 x 3.1 x 2.8 cm, likely benign cyst.OTHER: No significant abnormalities noted.
1.No evidence of abnormal perfusion or obstruction as clinically questioned.2.Subcentimeter right lower pole hypoechoic lesion as detailed above is present on the recent CT examination and may represent a proteinaceous cyst; however, close interval follow-up is recommended.