“The first time my mom realized that something was wrong was when I came home from school and I fainted on the porch. She was like, ‘Okay, let’s take you to the doctor.’ So that’s how it all...

Like most teenage boys, Arman Noorani enjoys playing video games. He counts “Battlefield 3” and “Borderlands 2” among his favorites. He even has his own YouTube channel, “armann539”, where...