Sandbox: DDx Kidney mass
50-60 yo male Asymptomatic Incidental finding on imaging May have hematuria and flank pain Palpable flank mass
Nonmalignant causes
anaplastic sarcoma clear cell sarcoma mesoblastic nephroma metanephric stromal tumor nephroblastomatosis / nephrogenic rests neuroblastoma oncocytoid carcinoma after neuroblastoma ossifying