Intellectual disability is sometimes associated with syndromes of other defects caused by the same gene, but SYNGAP1-associated intellectual disability is not; it is therefore called non-syndromic intellectual disability.
而智力障碍有时与由同基因导致的其他缺陷造成的综合征有关，但与SYNGAP1相关的智力障碍并不会出现明显的症状，因此称为无症状智力障碍（non-syndromic intellectual disability）。