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E-Mail DURHAM, N.C. - Glioblastoma brain tumors are especially perplexing. Inevitably lethal, the tumors occasionally respond to new immunotherapies after they ve grown back, enabling up to 20% of patients to live well beyond predicted survival times. What causes this effect has long been the pursuit of researchers hoping to harness immunotherapies to extend more lives. New insights from a team led by Duke s Preston Robert Tisch Brain Tumor Center provide potential answers. The team found that recurring glioblastoma tumors with very few mutations are far more vulnerable to immunotherapies than similar tumors with an abundance of mutations. The finding, appearing online Jan. 13 in the journal ....