Vital Signs: Boys and Brains and Genes

A hyperactive five-year-old is having trouble fitting in at school. Does he have ADHD, or could his 
behavior be a clue to a deeper, genetic problem?

By Mark Cohen|Wednesday, April 4, 2012
The five-year-old ran into my exam room with his mother trailing behind. He wore a Transformers T-shirt and jeans that each bore signs of a recent encounter with a chocolate bar. Immediately he took a toy train apart and scattered the pieces all over the floor. “The kindergarten teacher said she doesn’t think Jason belongs in the class,” the mother said to me. “But we’re not sure.”
Jason’s pediatrician had referred him to me because of his hyperactive behavior. “New patient to me,” her note sai...

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