Filling defect in renal collecting system

Common: Angiomyolipoma; Blood clot; Hamartoma; Hemangioma; Kidney stone; Lymphoma; Metastasis; Normal renal artery or vein impression; Oncocytoma; Papilloma; Renal cell carcinoma; Renal sinus lipomatosis; Transitional cell carcinoma; Urinary tract gas; Wilms tumor
Uncommon: Aberrant papilla; Amyloidosis; Hydatid cyst; Inflammatory polyp; Leukoplakia; Malacoplakia; Multicystic kidney with pelvoinfundibular atresia; Mycetoma; Parapelvic renal cyst; Parenchymal renal cyst; Polycystic kidney; Pyelitis cystica; Pyelonephritis with debris; Saccular aneurysm; Sloughed papilla; Urinary tract cholesteatoma; Urinoma

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