Dallas Cowboys owner and general manager Jerry Jones has revealed for the first time that he quietly battled stage 4 melanoma for more than a decade and credits an experimental immunotherapy drug with saving his life.

NBC Dallas-Fort Worth spoke with Brad Townsend, the sports reporter from The Dallas Morning News who first broke the story on Wednesday.

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"This a 15-year-old secret,” Townsend said. “He said that he was diagnosed in 2010. And he and his family have kept that to themselves all this time.”

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Townsend says the revelation came after he previewed an unreleased and up

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