There is an extremely large mass occupying most of the left abdomen. It is predominantly cystic in nature centrally with solid well-defined peripheral margins. A small part of the normal left kidney is noted displaced inferiorly. The enhancing renal tissue appears to embrace the adjacent portion of the mass forming acute angles with it, giving the appearance of claw sign. The mass displaces the surrounding organs/vasculature but no convincing evidence of vascular engulfing/ invasion.
Differential diagnosis: Mesoblastic nephroma or Wilms tumour.