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Cancer may preventable in some cases, but two-thirds of people who get cancer may just be victims of bad luck, instead of lifestyle choices or genetics.

Researchers at Johns Hopkins University School of Medicine say eating right and avoiding smoking may help prevent lung cancer.

But they say other forms, like cancer of the brain, bones, blood, ovaries and pancreas, are more likely the result of random DNA mutations.

Director of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University Dr. Leon Platanias joined WGN’s Dina Bair to discuss this research further.