syndromic intellectual disability multiple congenital anomalies/dysmorphic syndrome-intellectual disability Weaver-Williams syndrome https://github.com/monarch-initiative/mondo/issues/5588 UMLS:C0796198 GARD:0005545 MONDO:0018095 MEDGEN:1392915 Orphanet:3448 Weaver-Williams syndrome is a multiple congenital anomalies syndrome characterized by moderate-to-severe intellectual disability, decreased muscle mass, microcephaly, facial dysmorphism (prominent ears, midfacial hypoplasia, small mouth and cleft palate), clinodactyly of the fingers, delayed osseous maturation and generalized bone hypoplasia. The syndrome has been described in a brother and sister and an autosomal recessive mode of inheritance has been suggested. There have been no further descriptions in the literature since 1977.