22q11.2DS is one of the most common microdeletion syndromes (1 / 2000-1 / 4000 births) and one of the most robust genetic risk factors for schizophrenia (1 to 2% of cases). Reciprocally, approximately 30% of patients with 22q11.2DS will develop psychotic symptoms in adolescence or early adulthood. It is now well established that children and adults with 22q11.2DS have lower social skills than developing youth. These social dysfunctions could be partly underpinned by alterations in social cognitive processes, and could also be linked to the emergence of psychotic signs or even schizophrenia. However, to our knowledge, no study has investigated the existence of behavioral prodromal signs during the onset of psychotic signs in children with 22q11.2DS. In addition, the origin of social cognitive processes remains to this day little explored.
The study PremiCeS22 will investigate the prodromal signals at the onset of psychotic disorders of children with 22q11.2 deletion syndrome