What Is Glioblastoma? Sen. John McCain Diagnosed With Brain Cancer05:25
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Sen. John McCain (R-Az.) heads into a closed-door committee meeting in the Hart Senate Office Building June 15, 2017, in Washington, D.C. (Chip Somodevilla/Getty Images)
Sen. John McCain (R-Az.) heads into a closed-door committee meeting in the Hart Senate Office Building June 15, 2017, in Washington, D.C. (Chip Somodevilla/Getty Images)
This article is more than 2 years old.

Sen. John McCain has been diagnosed with a brain cancer called glioblastoma.

Here & Now's Robin Young talks with Dr. Barbara O'Brien, an assistant professor of neuro-oncology at the University of Texas MD Anderson Cancer Center, about what glioblastoma is and how it's treated.

This segment aired on July 20, 2017.

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