Neurodevelopmental Disorder with Speech Impairment and Dysmorphic Facies, is also known as nedsid. An important gene associated with Neurodevelopmental Disorder with Speech Impairment and Dysmorphic Facies is SETD1A (SET Domain Containing 1A, Histone Lysine Methyltransferase). Affiliated tissues include brain and eye, and related phenotypes are delayed speech and language development and global developmental delay