The researchers analyzed 1992-2008 data on more than 1 million cancer patients of all ages in the United States. They then looked for second cancers, meaning a new cancer, not a recurrence. They found that the five-year survival rate for children and young adults was 80 percent after a first cancer. However, it dropped to 47 percent for children and 60 percent for young adults in cases of second cancers, Keegan and her colleagues said in a university news release.

Source: Second Cancers Deadlier for Younger People: Study