text: what is the percent rate of children with cancer yearly?   thankfully, childhood cancer is relatively rare, affecting only about 14 of every 100,000 children in the united states each year. http://kidshealth.org/parent/medical/cancer/cancer.html  each year approximately 12,500 american children are diagnosed with cancer.  http://www.healthatoz.com/healthatoz/atoz/dc/cen/canc/gen/parentsguide.jsp