Second cancers in children and adolescents and young adults (AYA) are far deadlier than they are in older adults and may partially account for the relatively poor outcomes of cancer patients ages 15-39 overall, a new study by UC Davis researchers has found.

The study also found that survival after almost all types of cancer is much higher when the cancer occurs as a primary malignancy than if it is a second cancer, and these survival differences are most pronounced in patients under age 40. The article, entitled "Second Primary Malignant Neoplasms and Survival in Adolescent and Adult Cancer Survivors," is published in JAMA Oncology.

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