"I would definitely not want the FDA to take that away from patients, " said Dr. Deepa Subramaniam, director of the brain tumor center at Georgetown Lombardi Comprehensive Cancer Center in Washington, D.

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"It's exciting to have a race, " says Dr. Tom Mikkelsen, codirector of the Hermelin Brain Tumor Center at the Henry Ford Hospital in Detroit.

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Surgeons at Duke University Medical Center in Durham, North Carolina, removed as much of the tumor as possible the following month.

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After he was shot by law enforcement, his request was honored, and lo and behold, he was right: A tumor was growing throughout the "rage center" of his brain.

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Inside the Preston Robert Tisch Brain Tumor Center, Karen waits patiently as a parade of doctors and technicians pokes and prods, taking samples of all kinds.

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"We are in the beginning of what will be a huge new field of tumor ablation, " says interventional radiologist Stephen Solomon at the Memorial Sloan-Kettering Cancer Center.

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"I think it should change care" and that older patients should be told "that they don't necessarily need to have the kidney tumor removed, " said Dr. William Huang of New York University Langone Medical Center.

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