Posted: Apr 15, 2013 10:56 AM by NBC News
Doctors at the Mayo Clinic in Minnesota are killing off cancerous tumors by freezing them.
The procedure, called cryoablation, was used on tumors that had spread to the lungs from other parts of the body.
Doctors use a probe to apply extreme cold, -148 degrees Fahrenheit, to the tumor. They said it killed cancer cells for at least three months without affecting healthy tissue.
This isn't a cure for cancer, but experts say it could help slow tumor growth.
Researchers plan to follow these patients for 5 years.
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