If there is no cause is detected for spleenomegaly and it is destroying blood cells that means you have anemia ,what is your hemoglobin
level and are you having hemolysis
that means Jaundice
with unconjigated bilirubin
is raised . May be you have mild anemia
or but if spleen is enlarged and advised a spleenectomy by a Hematologist
.I think you should plan for it only thing advised is as they are prone to get Peumococcal infection. They will advise you for a Polyvalent vaccine
which you must take . All the best I hope this will help you lot.