Mayo Clinic breaks ground for proton beam cancer facility

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The Mayo Clinic campus is now getting bigger. On Tuesday, officials broke ground on a new $200 million cancer facility.

The addition adds a proton beam treatment center to the Mayo Clinic. Hospital officials say proton beam therapy is a more precise radiation therapy, delivering higher doses of radiation to cancerous tumors.

"As mayor of the city, I'm honored and proud that Mayo Clinic, the very best medical institution in the world, has decided to make this major investment in our city," said Phoenix Mayor-Elect Greg Stanton, "and we're going to become world renowned because of the medical care that's provided right here in this facility."

The goal of the therapy is to most precisely target the tumors, sparing healthy tissue and organs.

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