Mental Retardation with Optic Atrophy, Deafness, and Seizures, also known as gustavson syndrome, is related to severe x-linked intellectual disability, gustavson type, and has symptoms including seizures An important gene associated with Mental Retardation with Optic Atrophy, Deafness, and Seizures is GUST (Gustavson Mental Retardation Syndrome (With Microcephaly, Optic). Affiliated tissues include brain and adipocyte, and related phenotypes are hearing impairment and intellectual disability