DO_rare_slim has material basis in syndromic X-linked intellectual disability syndromic X-linked intellectual disability Snyder type DOID:0060802 disease_ontology GARD:5615 ICD10CM:Q87.8 ORDO:3063 MIM:309583 A syndromic X-linked intellectual disability characterized by mild to profound intellectual disability, facial asymmetry, marfanoid habitus, asthenic habitus, unsteady gait, thickened lower lip, nasal dysarthic speech, narrow or cleft palate, osteoporosis, kyphoscoliosis, long great toes, short stature, pectus carinatum, and myopia that has_material_basis_in mutation in the SMS gene on chromosome Xp22. SRS Snyder-Robinson mental retardation syndrome Snyder-Robinson syndrome mental retardation, X-linked, Snyder-Robinson type spermine synthase deficiency X-linked recessive disease X-linked recessive inheritance