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  • Video: Mount Sinai doctors treat stroke patient, reverse brain damage

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After suffering a stroke, Rebeca de Lopez, 70, went seven hours before undergoing surgery. Ryan Dahlgren, a neurovascular surgeon at Mount Sinai Medical Center in Miami Beach, describes how doctors were able to reverse the damage to de Lopez's brain.
After suffering a stroke, Rebeca de Lopez, 70, went seven hours before undergoing surgery. Ryan Dahlgren, a neurovascular surgeon at Mount Sinai Medical Center in Miami Beach, describes how doctors were able to reverse the damage to de Lopez's brain.

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  • Air Force special-ops trainee Paul Casas, on being diagnosed with Moyamoya disease, a rare brain disease.

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