Wilms Tumor - Childhood: Statistics

Approved by the Cancer.Net Editorial Board, 02/2018

ON THIS PAGE: You will find information about the number of children who are diagnosed with a Wilms tumor each year. You will also read general information on surviving the disease. Remember, survival rates depend on several factors. Use the menu to see other pages.

In the United States, about 500 children are diagnosed with a Wilms tumor each year. The disease accounts for about 5% of all childhood cancers. Wilms tumor occurs most often in young children between the ages of 3 and 4. It is uncommon after age 6.

The 5-year survival rate tells you what percent of children live at least 5 years after the cancer is found. Percent means how many out of 100. The 5-year survival rate for children with Wilms tumor is 93%. However, the rate varies according to the stage of the disease.

Stage I, II, and III tumors with a favorable histology have a 4-year survival rate that ranges from 94% to 99%. Stage IV and V tumors have a 4-year survival rate of 86% and 87% respectively. Survival rates for tumors with an anaplastic histology are lower in each category and range from 83% for children with a Stage I tumor to 38% for Stage IV and 55% for a Stage V tumor.

It is important to remember that statistics on the survival rates for children with a Wilms tumor are an estimate. The estimate comes from annual data based on the number of children with this tumor in the United States. Also, experts measure the survival statistics every 4 or 5 years. So the estimate may not show the results of better diagnosis or treatment available for less than 4 or 5 years. People should talk with their child’s doctor if they have any questions about this information. Learn more about understanding statistics.

Statistics adapted from the American Cancer Society's (ACS) publication, Cancer Facts and Figures 2018, and the ACS website.

The next section in this guide is Medical Illustrations. It offers drawings of body parts often affected by a Wilms tumor. Use the menu to choose a different section to read in this guide.