How is dx of renal mass?

History : flank pain , hematuria , HTA.. P.E : abdominal mass , Lab studies : anemia , hypercalcemia …. Radio: US (differentiate cyst and mass), CT (very important, delineates nature of renal mass), IVP, MRI, renal arteriography (rare usage). Renal Mass biopsy CT/MRI guided (indication [small mass to r/o malignancy, sus of renal abscess or RCC differentiation from metastatic malignant disease/renal lymphoma)