ON THIS PAGE: You will find information about how many children are diagnosed with this type of tumor each year and some general survival information. Remember, survival rates depend on several factors. To see other pages, use the menu on the side of your screen.
In the United States, about 500 children are diagnosed with Wilms tumor each year. It accounts for about 5% of all childhood cancers. Wilms tumor occurs most often in young children between the ages of three and four, and it is uncommon after age six.
The five-year survival rate is the percentage of children who survive at least five years after the tumor is found. The five-year survival rate for children with Wilms tumor is 90%. Stage I, ll and lll tumors with a favorable histology have a four-year survival rate that ranges from 94% to 99%. Stage IV and V tumors have a four-year survival rate of 86% and 87% respectively. Survival rates regarding tumors with an unfavorable histology (anaplastic) are lower in each category, and range from 83% for children with a Stage I to 55% for Stage V tumor.
Survival statistics should be interpreted with caution. These estimates are based on data from thousands of children with this type of tumor, so the actual risk for a particular individual may be different. It is not possible to tell a child how long he or she will live with Wilms tumor. Because the survival statistics are measured in multi-year intervals, they may not represent advances made in the treatment or diagnosis of this cancer. Learn more about understanding statistics .
Statistics adapted from the American Cancer Society's (ACS) publication, Cancer Facts and Figures 2015, and the ACS website.
The next section in this guide is Medical Illustrations  and it offers drawings of body parts often affected by this disease. Or, use the menu on the left side of your screen to choose another section to continue reading this guide.