San Diego (CNN) -- As a teenager, Alli Morgan lived for sports. She was a cyclist and a climber, and she played on her high school's softball and field hockey teams.
That all ended abruptly her sophomore year, the day Morgan tore a ligament in her right knee during a field hockey game. She underwent ACL surgery, expecting a quick recovery. Instead, it led to 45 more operations on her knee, months in the hospital and a diagnosis of a rare genetic disorder.