In 2016, the average life expectancy in the US was over 78 years. The average age of death for a child with cancer is under 11 years old. Childhood cancer results in as many as 50 more years of life lost than other cancers.
Average Age of Death for Pediatric Cancer Patient (age 0-19): 10.4 years
Source: Surveillance, Epidemiology, and End Results (SEER) Program (seer.cancer.gov)