National Public Radio and ProPublica launched an extensive series today on what has become known as the signature injury of the wars in Iraq and Afghanistan - traumatic brain injury.

Among the key findings:

  • From the battlefield to the home front, the military's doctors and screening systems routinely miss brain trauma in soldiers. One of its tests fails to catch as many as 40 percent of concussions, a recent unpublished study concluded. A second exam, on which the Pentagon has spent millions, yields results that top medical officials call about as reliable as a coin flip.
  • Even when military doctors diagnose head injuries, that information often doesn't make it into soldiers' permanent medical files. Handheld medical devices designed to transmit data have failed in the austere terrain of the war zones. Paper records from Iraq and Afghanistan have been lost, burned or abandoned in warehouses, officials say, when no one knew where to ship them.
  • Without diagnosis and official documentation, soldiers with head wounds have had to battle for appropriate treatment. Some received psychotropic drugs instead of rehabilitative therapy that could help retrain their brains. Others say they have received no treatment at all, or have been branded as malingerers.