Hi Alison,
Your sister is still young and that makes her prognosis better than most patients mentioned in this abstract:
http://tinyurl.com/6jwx26
I have red many reports from patients that have good results after SCT in this forum

. You can search for them at the search function.
Kind regards
Birgitta-A
69 yo, dx MDS Interm-1 May 2006, transfusion dependent, Desferal 4 days with transfusions for iron overload, Neupogen 2 injections/week for low white blood cells, asymptomatic