The best piece of advice I can give is relax. Get the facts and get your questions answered as Bob suggested. Then live life. Some folks are on watch and wait for a very long time before symptoms become severe enough to do anything. Don’t make life about MDS, there are too many good things going on.
Do you know if he has any chromosome abnormalities? That may tell you something about what to expect in the future. No guarentees, but are there really any in life? But some abnormalities tend to move slower than others. I have 5q- which is a low risk MDS. I was diagnosed in 06. Other than Aranesp every 2 weeks I don’t need any treatment at this point. My whites and platlets are fine. My hgb runs around 9-10. Shoots, I even had an 11 one week! Blew my mind, and my nurse’s too. She wondered if I was drinking enough or if I was dehydrated. A friend said he thought she meant I should drink water not Jack Daniels :*) Just joking, I have not drank Jack for 20 years or so.
Keep life in balance. As Bob said, lots of folks here who can answer questions for you.
Zoe