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Doctors Unveil Potential New Tool to Fight Brain Cancer

The blood-brain barrier is a natural defense system that prevents harmful substances in the blood from entering the brain.  Doctors may have found a way to get past the barrier to treat cancer patients. Neurosurgeons have been using lasers to treat brain cancer since 2009, but now they say the technique may also allow them to deliver chemotherapy drugs directly into the brain. The key is getting past the protective blood-brain barrier, which does its job so well it also keeps out...

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