While rare, pediatric strokes occur, affecting one in every 1,100 newborns and an additional 2,000 older children each year. The cause of a stroke is either a blood clot or bleeding in the brain. If left untreated, it can lead to damage or death of brain tissue. Dr. Kristin Guilliams, a pediatric neurologist with St. Louis Children's Hospital and Washington University School of Medicine, discusses stroke in children.