73 year old male patient with bilateral renal masses and previous left RFA. ABDOMEN:LIVER, BILIARY TRACT: A heterogeneously hyperintense T2 lesion within the superior pole of the left kidney which demonstrates enhancement has slightly increased in size measuring 2.3 x 2.3 cm (image 43, series 12), previously 1.8 x 1.6 cm. This remains concerning for malignancy.A T2 hypointense lesion in the right kidney with equivocal enhancement has not significantly changed in size measuring 1.6 x 1.3 cm (image 52, series 12), previously 1.6 x 1.4 cm. A T2 hypointense nonenhancing lesion in the posterior upper pole of the left kidney appears stable in size measuring 2.0 x 2.0 cm (image 42, series 12), previously 2.1 x 2 cm. This presumably represents the site of prior ablation. A left interpolar T2 isointense lesion with T1 hyperintensity may represent a proteinaceous or hemorrhagic cyst. Additional scattered subcentimeter T2 hyperintense lesions are too small to characterize.There is dilatation of the inferior left renal collecting system with renal cortical thinning. SPLEEN: No significant abnormality noted.PANCREAS: No significant abnormality noted.ADRENAL GLANDS: No significant abnormality noted.KIDNEYS, URETERS: No significant abnormality noted.RETROPERITONEUM, LYMPH NODES: A small retrocrural lymph node is not significantly changed in size measuring 1.1 cm. BOWEL, MESENTERY: No significant abnormality noted.BONES, SOFT TISSUES: No significant abnormality noted.OTHER: No significant abnormality noted.
1.Left upper pole enhancing renal lesion is slightly increased in size; this is concerning for malignancy.2.Stable T2 hypointense lesion within the right kidney with indeterminate enhancement; continued attention should be paid on subsequent imaging.3.Stable dilatation of the left inferior pole collecting system.