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There is a large heterogeneous solid/cystic mass in the left abdomen. There are many small necrotic areas within the center of the mass. There are multiple cystic structures at the inferior aspect of the mass may represent displaced and distorted renal calyces. Displacement of the surroundings organs/vasculature is noted. However, no obvious invasion. On Doppler images, there is a peripheral vascularity in the solid portion.