A 66-year-old Man With Bilateral Renal Masses

A 66-year-old black man initially presented for evaluation of incidentally detected, Stage I, cT1aN0M0, synchronous, bilateral, clinically localized tumors that were suspicious for renal cell carcinoma (RCC). He has a history of hypertension but is otherwise healthy, with normal renal function (creatinine 0.80 mg/dL; estimated glomerular filtration rate >60 mL/min/1.73m2).

Triphasic abdominal imaging (see figure) revealed a 2.4 x 2.1 cm ...