Sandbox: DDx Kidney mass

• 10-30 yo sickle cell trait patients
• May have gross hematuria, back/flank pain, weight loss, and fever

• Palpable renal mass
• Lymphadenopathy

• Centrally located infiltrative mass invading the renal sinus
• Peripheral caliectasis
• Smaller peripheral satellite nodules
• Heterogeneous enhancement on CT
• Heterogeneous echotexture on US

Nonmalignant causes

anaplastic sarcoma clear cell sarcoma mesoblastic nephroma metanephric stromal tumor nephroblastomatosis / nephrogenic rests neuroblastoma oncocytoid carcinoma after neuroblastoma ossifying