ATLANTA — A new report says childhood cancer cases continue to increase, but death rates have fallen by half.

The American Cancer Society report — released Friday — is being called one of the most comprehensive looks at the types of cancer that most commonly affect children and adolescents.

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Childhood cancer is considered rare, especially compared with cancer in adults. Still, it’s the second leading cause of death in pre-adolescent, school-aged children.

It is growing more common. New diagnoses have been inching up each year, led by some types of blood and lymphatic cancers.

The good news: Childhood cancer death rates dropped more than 50 percent since 1975, to 24 per 1 million kids and adolescents in 2010.