Wilms tumour

What is Wilms tumour?

Wilms tumour starts in cells of the kidney and is the most common kidney cancer in children.

Risks for Wilms tumour

Risks for Wilms tumour are certain genetic conditions and a family history of the disease.

Symptoms of Wilms tumour

Common signs and symptoms of Wilms tumour include a painless lump in the abdomen, swelling of the abdomen and blood in the urine (pee).

Diagnosis of Wilms tumour

Wilms tumour can be diagnosed or ruled out by tests such as an ultrasound, a CT scan and blood chemistry tests.

Stages of Wilms tumour

The stage of Wilms tumour describes where the tumour is located and whether the cancer has spread.

If Wilms tumour spreads

Wilms tumour can spread (metastasize) to the structures and lymph nodes near the kidney, the lungs and the liver.

Prognosis and survival for Wilms tumour

Prognosis estimates the outcome for Wilms tumour. It depends on many factors including the type of tumour, stage and chromosome changes.

Treatments for Wilms tumour

Wilms tumour can be treated with surgery, chemotherapy and radiation therapy.

Supportive care

Supportive care for Wilms tumour helps children and their families meet physical, emotional and spiritual challenges.

Childhood kidney and renal pelvis cancer statistics

Cancer statistics tell us how many children in Canada are diagnosed with and die from childhood kidney and renal pelvis cancer in a certain time frame.

Your trusted source for accurate cancer information

With support from readers like you, we can continue to provide the highest quality cancer information for over 100 types of cancer.

We’re here to ensure easy access to accurate cancer information for you and the millions of people who visit this website every year. But we can’t do it alone.

Every donation helps fund reliable cancer information, compassionate support services and the most promising research. Please give today because every contribution counts. Thank you.

Medical disclaimer

The information that the Canadian Cancer Society provides does not replace your relationship with your doctor. The information is for your general use, so be sure to talk to a qualified healthcare professional before making medical decisions or if you have questions about your health.

We do our best to make sure that the information we provide is accurate and reliable but cannot guarantee that it is error-free or complete.

The Canadian Cancer Society is not responsible for the quality of the information or services provided by other organizations and mentioned on cancer.ca, nor do we endorse any service, product, treatment or therapy.


1-888-939-3333 | cancer.ca | © 2026 Canadian Cancer Society