This isn't a new finding...

But I thought it was interesting nonetheless...

"Pain from any injury or illness is always registered by the brain. Yet, curiously, the brain tissue itself is immune to pain; it contains none of the specialized receptor cells that sense pain in other parts of the body. Thus, the pain associated with brain tumors does not arise from brain cells but from the pressure created by a growing tumor or tissues outside the brain."

Another marvel of the human body

Sources: http://www.pbs.org/wnet/brain/3d/, http://www.arcamax.com/trivia/s-142594-750125, http://www.mayoclinic.com/health/pain/PN00017, http://biology.about.com/od/humananatomybiology/a/anatomybrain.htm