[Development of psychological and intellectual performance in transplanted sickle cell disease patients: a prospective study from pretransplant period to 5 years after HSCT].

Rationale: Allogeneic hematopoietic stem-cell transplantation (HSCT) is the only curative treatment for sickle cell disease (SCD). Cerebral vasculopathy was the principal indication for transplantation. These children could present impaired neuropsychological development related to different causes, hence the value of exploring their intellectual capacities before and after transplantation.