When I was 18, I informed my doctor I'd be attending college in the fall.
Later, he asked to speak to my parents privately. He told them it was nice that I was going to college but, because I had Duchenne muscular dystrophy (DMD), they shouldn't expect me to survive to graduate.
Well, I finished college. I'm now almost 40 years old and working as a software engineer. Ironically, five years after making that statement, the doctor passed away.