A partial monosomy of the long arm of chromosome 9 with characteristics of intellectual disability, developmental delay with pronounced speech delay, short stature and muscular hypotonia. Common craniofacial dysmorphic features consist of microcephaly, prominent forehead, round face, arched eyebrows, upslanting palpebral fissures, strabismus, short nose and thin upper lip. Other clinical findings include epilepsy, ataxia, unspecific brain MRI findings, early-onset primary dystonia, nail dysplasia and bone malformations, in particular patellar abnormalities, epistaxis and cutaneous-mucous telangiectasia. [from
SNOMEDCT_US]