That's really $hitty IP (I mean his diagnosis, not the carer part). It's another one of those things, that because of advancements with medical diagnostic techniques, these illnesses are getting picked up much earlier than before.
It's the same with many cancers. I can't tell you how many of my friends are having to deal with that currently.
All the best for the future with your dad Irish. Has he got someone who can go with him to games?