IMPORTANT: We currently have a number of bugs related to image cropping and are actively trying to resolve them. In the meantime, we have disabled cropping. Apologies for any inconvenience. Stay informed: radiopaedia.org/chat

Wilms tumor

Case contributed by Jeremy Jones
Diagnosis certain

Presentation

Abdominal mass.

Patient Data

Age: 3 years

CT abdomen

ct

A very large heterogeneous mass arising from the right kidney, and displacing the remaining renal parenchyma anteromedially is noted. The mass contains mixed solid and cystic areas only only marginally enhances. 

On these images, there is no convincing evidence of spread into adjacent structures. There is no convincing involvement of the renal vein or IVC. No convincing nodal or distant metastatic disease in the portions imaged.

Diagrammatic depiction of the claw sign, referring to the sharp angles on either side of the mass which the surrounding normal parenchyma forms when the mass has arisen from the parenchyma. An extrinsic mass pushing in will have blunt rounded interface with the underlying parenchyma. 

Case Discussion

This case demonstrates the typical appearance of a large right-sided Wilms tumor.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.