Hi Cindy
a BMT is the only cure for CML. Drugs and chemo may be used but generally the CML comes back. Great results have been obtained with BMT in CML. The types of BMT include autologous (your own cells), allogenic ( a sibling) or a unrelated donor. The problem with UD is a complication called Graft vs Host disease where the bone marrow that was used attacks the body because it wasnt a perfect match. GvHD disease can be a major problem, even fatal. The preparation the body needs is to get rid of all existing cancer cells. This could be chemo or radiation. Once that is done, then the BMT can take place.
Talk with the docs and explore all the options. Lauren should do well.
God bless.