Wilms tumor

Case contributed by Frank Gaillard


Abdominal swelling.

Patient Data

Age: Child
Gender: Male
  • Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Abdominal x-ray demonstrates a soft tissue opacity in the left upper quadrant, displacing adjacent loops of bowel. 


Large, heterogeneous vascular mass involving the majority of the left kidney. The tumor is so large that there is an obvious bulge out of the child's abdomen.

Case Discussion

Young boy with a left sided Wilms tumor. The important finding which strongly points to the kidney as the site of origin of the mass is the so called claw sign; the renal parenchyma seems to embrace the mass, with sharp acute angles. An extra-renal mass would have obtuse angles.  

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