Suggest Treatment For Less Lesions

has a toddler my son was diagnosed with thallassemia during the 19 nineties there was not very much information or discussion with me about what this meant and he became older he was in a car wreck it was knocked out a cat scan showed he had lesions of the counterion during a six week. They continued to doing scans the final PET scan showed there were less lesions in in the beginning yeah we were never informed on any follow-up treatment or what this might mean for him could you please tell me what we should be doing about this as follow up knowledge treatment prognosis thank you or complications that he should be looking for symptoms I m not really sure how to ask this question I m just very concerned about my son