Intellectual Developmental Disorder, X-Linked, Syndromic, Armfield Type, also known as armfield x-linked mental retardation syndrome, is related to autism x-linked 2 and cerebellar atrophy, developmental delay, and seizures, and has symptoms including seizures An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic, Armfield Type is FAM50A (Family With Sequence Similarity 50 Member A). Affiliated tissues include heart and kidney.