You people didn't quite get the question:
In all honesty Carey, you should inform the medical department of the airline you would going to apply for; otherwise, when they find out about it later, it could be grounds for dismissal, or you losing the medical benefits, if any.
There are hundreds of forms of cancers with various degrees of aggressiveness, and remission is a good thing for many forms.
You should, however, give priority to your health. As said here before, an airline career is very demanding and for the most part, very unhealthy, too.
Good luck and all the best