Dear Mumtaz,
BMT is a procedure that should be decided upon after careful consideration and consultation with a bmt clinic that has had considerable success with the procedure. A complete match is required for a bmt in thalassemia, and a sibling donor is best. When the marrow is not completely matched the procedure becomes extremely toxic and can be life threatening.
If you plan to do a BMT ensure that your son's iron levels are low and that his thalassemia is very well managed because the better health a child is in before bmt the better they will do with the bmt.
Best of luck,
Sharmin