Brunner syndrome is a rare genetic disorder associated with a mutation in the MAOA gene. Wikipedia

Amino acid metabolic disorder characterized by recessive X-linked inhetiance, impaired monoamine metabolism, impulsive aggressiveness and mild mental retardation that has material basis in mutation in the MAOA gene on chromosome location Xp11 Wikidata

A genetic disorder associated with mild intellectual disability, impulsiveness, sudden changes of mood, and aggressive and antisocial behaviours. Wiktionary