6-year-old boy battles disease that causes strokes

Brady Tess puts the palms of his 6-year-old hands on his forehead to help his thoughts and words come together.The first grader at Estates Elementary School is chatty. But he fights short-term memory loss and a speech impediment after two strokes.The youngster has a rare neurological condition, Moyamoya disease. A few hundred children are diagnosed with it worldwide every year.A scar on each side of his head are fresh from brain surgery at Boston Children's Hospital in October.That's where a ped