Congratulations! How long did the donor search take once they started looking?
They routinely give pre-transplant patients a once-over before scheduling the transplant. Think of it like the "all-systems" reviews they do before launching a rocket. In both cases it's hard to turn back once you get started!
Typical health checks include organs (lungs, heart, liver, kidneys, nervous system, mouth), evaluation of your MDS status, medical history, and maybe even a psychological evaluation. They may rate you on the
Karnofsky Performance scale.
All of this is to make sure they know where your health stands, know what the risk factors are, and can conclude that a transplant is a suitable treatment.