Hi Lillie
I have learnt in the Singapore conference that splenctomy is not advised as long as you can live with your spleen and it does not threaten your life like becoming very big in size.
But as Zaini said, taking the spleen could result in increasing the intervals between transfusions, but in the majority of cases the usual frequency before splenectomy is back.
Also taking the spleen off increases chances of infections and thrombosis.
I guess that in your case, keeping the spleen out weighs taking it off, first because the surgery might be dangerous ( since the doctors couldn't decide till now and of course they are the only ones who have a say on this). Second because the target is to decrease the iron overload and i guess that you can achieve this by having compliance to chelation ( if your are not dedicated to chelation in the first place, you will get iron overload even if you removed the spleen), third, decreasing the transfusion rate is not guranteed
Lillie, i am sure you understand that this is not a not a medical advice, but is just my opinion
hope it helps
manal