Sandbox: DDx Kidney mass

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  • Middle aged patients
  • Majority are asymptomatic
  • May have hematuria , recurrent renal calculi, and recurrent UTI
  • Often unremarkable
  • Bilateral cystic dilatation of the collecting tubules on CT
  • Hyperdense papillae with clusters of calcifications
  • "Paintbrush-like" appearance








Nonmalignant causes

acquired cystic kidney disease  cystic renal dysplasia glomerulocystic kidney medullary sponge kidney mesothelial cysts nephronophthisis simple cysts