Figure 1.

Wilms tumours in different patients. (a) This 5-year-old girl survived a severe syncopal episode 2 weeks prior to presenting with an abdominal mass. There was a small tumour thrombus protruding into the IVC from a large less renal mass. Presumably the saddle embolus in the pulmonary arteries had been in the IVC and detached itself, resulting in a near death episode. (b) Coronal T2-weighted images showing bilateral Wilms tumours in the upper poles and some generalized ascites. Small hyperintense areas in the lower pole of the right kidney were thought to be foci of nephroblastomatosis.