NR4A2 and neurodevelopmental disorder: Among those, the nuclear receptor superfamily 4 group A member 2 (NR4A2) gene has recently been highlighted as a major candidate for causing ASD [9], whereas gene-disruptive mutations and chromosomal deletions that only overlap with the gene were implicated in a monogenic and consistent phenotype of neurodevelopmental disorders and language impairment, with or without seizures [10,11,12,13].