The cause of bony changes in thals is low Hb. As the Hb drops, bone marrow activity increases as the body attempts to grow more red blood cells (you will see this reflected in RBC and RDW. The MCV in thals is much lower than normal.), and the bone marrow expands causing weakening and expansion of the bones. The patient can be examined and evaluated to see if this is taking place. In your child's case, this had already begun, so transfusion was commenced. Rajiv's son's x-rays showed he has not yet reached the stage where this happens, but based on genotype, the boy will most likely eventually require transfusions. When the Hb stays high, it can delay transfusions, it makes it easier to find veins and the patient won't have to chelate as early, which does make it easier once chelation begins because the child isn't as young.