Glioblastoma multiforme (GBM), a devastating type of brain cancer, has been in the news again with Senator John McCain’s recent diagnosis. It is notoriously aggressive, growing rapidly and often defying treatment with surgery, radiation and chemotherapy. Tumors can be removed by surgery, but they nearly always come back. By most estimates, half the patients with this diagnosis will succumb to it in 15 to 18 months, and only five or 10 percent will be living in…
