syndromic intellectual disability congenital nervous system disorder developmental disability radioulnar synostosis-developmental delay-hypotonia syndrome https://github.com/monarch-initiative/mondo/issues/5588 https://rarediseases.info.nih.gov/diseases/1810/der-kaloustian-mcintosh-silver-syndrome https://www.malacards.org/card/radioulnar_synostosis_developmental_delay_hypotonia_syndrome https://www.malacards.org/card/radioulnar_synostosis_unilateral_with_developmental_retardation_and_hypotonia Orphanet:3270 UMLS:C1849470 GARD:0001810 SCTID:721883006 unilateral radio-ulnar synostosis, generalized hypotonia, developintellectual disability, and a characteristic facial appearance unilateral radio-ulnar synostosis, generalized hypotonia, developmental retardation, and a characteristic facial appearance Radioulnar synostosis-developmental delay-hypotonia syndrome, also known as Der Kaloustian-McIntosh-Silver syndrome, is an extremely rare syndrome with synostosis described in about 4 patients to date with clinical manifestations including congenital unilateral radioulnar synostosis, generalized hypotonia, developmental delay, and dysmorphic facial features (long face, prominent nose and ears). Der Kaloustian-McIntosh-Silver syndrome MESH:C564856 MEDGEN:341460 OMIM:266255 radioulnar synostosis, unilateral, with developmental retardation and hypotonia MONDO:0009952 MESH:C538217 unilateral radio-ulnar synostosis, generalised hypotonia, developintellectual disability, and a characteristic facial appearance radioulnar synostosis with developmental delay and hypotonia syndrome unilateral radio-ulnar synostosis, generalised hypotonia, developmental retardation, and a characteristic facial appearance multiple congenital anomalies/dysmorphic syndrome-intellectual disability congenital radioulnar synostosis congenital limb malformation