There is well defined heterogenous soft tissue lesion at the right side of the retroperitoneal cavity located at the posterolateral aspect of the right kidney measuring (78mm length x 54mm width x 55mm AP diameter).
The lesion has heterogenous consistency and enhancing heterogeneously after administration of IV contrast.
There are multiple focal areas of liquefaction and few fatty locules at the peripheral aspect of the lesion.
The lower pole of the right kidney displaced medially & upward with a preserved fat plan between the lesion and the surrounding structures (lower border of the right lobe of the liver.the lower border of the right kidney, bowel loops, chest wall muscles, and paravertebral muscles.
There is little fatty stranding surrounding the posterior border of the lesion.