Syndromic X-Linked Intellectual Disability Shashi Type, also known as mental retardation, x-linked, syndromic 11, shashi type, is related to intellectual developmental disorder, x-linked, syndromic 11 and x-linked intellectual disability, shashi type. An important gene associated with Syndromic X-Linked Intellectual Disability Shashi Type is RBMX (RNA Binding Motif Protein X-Linked). Related phenotypes are coarse facial features and prominent supraorbital ridges