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John McCain Was Diagnosed With A Glioblastoma, Among The Deadliest Of Cancers

Glioblastomas are the most common malignant brain tumor. About 12,000 people in the U.S. are diagnosed with the cancer every year. (Sherbrooke Connectivity Imaging Lab/Science Source)
Glioblastomas are the most common malignant brain tumor. About 12,000 people in the U.S. are diagnosed with the cancer every year. (Sherbrooke Connectivity Imaging Lab/Science Source)

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