Dr. Boockvar Discusses John McCain’s Battle with Glioblastoma

Before beginning treatment for a malignant brain tumor, Sen. John McCain returned to the floor of the Senate Tuesday to cast a vote on the GOP healthcare bill. Dr. John Boockvar, Director of the Brain Tumor Center at Lenox Hill Hospital, discusses the the type of cancer - glioblastoma - McCain is battling and how it affects the brain.

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