Intellectual Disability-Severe Speech Delay-Mild Dysmorphism Syndrome

Intellectual disability-severe speech delay-mild dysmorphism syndrome, also known as intellectual disability with language impairment and with or without autistic features, is a disorder characterized by global developmental delay with moderate to severe speech delay that affects expressive speech. Most patients have difficulty articulating words. Common signs and symptoms include broad forehead, downslanting eyelid folds (palpebral fissures), short nose with broad tip, head appearing too large for the body, frontal hair upsweep, bulging digit pads and delayed gross motor skills. Some patients have autistic features and/or behavioral problems. Congenital malformations may be associated. All reported cases have been the first to occur in the family (de novo). This condition is caused by changes (mutations) in the FOXP1 gene.