Not sure of the diagnostic of myelodysplasia?

If your dad has an Oncologist/Hematologist and that's what he found after testing, then I think you should listen to him. But, I'm all for second opinions. Your dad should seek another opinion with something this serious. His doctor will not be angry if he does, because any good reputable doctor will welcome another opinion. So tell your dad or ask him to get another opinion. It's always wise in serious cases like this. I did and it's a good thing I did. God bless and I hope Your dad does well.