Nov 27, 2012 1:04 PM by NBC News
Doctors have discovered physical evidence that chemotherapy causes changes in the brain, affecting a patient's concentration and memory.
Cancer patients often describe having "chemo brain" because they feel like they're in a "fog" or have problems coping, but it's been difficult to determine the cause.
After studying more than 100 patients, researchers found that although there was little difference in brain volume, there were significant changes in brain metabolism in areas linked to planning and prioritizing.
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