I'm very sorry too, I don't know how it feels but I feel pain in a way for your son, too...
Spells will not work about that. Reiki will help, although Reiki may take a while... I suggest ask help from Gods and I know some of them that specialise in healing... I know an easy way to contact these (if they desire) and it's not a formal and direct summoning of them... Mail me if you want to know more, I promise I'll do my best to help you.