My uncle had it several years ago, had the treatment and is going great guns now with it behind him. I believe it's one of those highly treatable cancers, especially because the antigen tests mean it can be picked up early. also FWIW there are other benign reasons why the blood tests can be elevated. But big hugs to you anyway, it can be really scary waiting to find out what is happening. I hope those results come back good for your dad.