Syndromic X-Linked Intellectual Disability 34, also known as macrocephaly-intellectual disability-left ventricular non compaction syndrome, is related to intellectual developmental disorder, x-linked, syndromic 34 and myasthenic syndrome, congenital, 20, presynaptic. An important gene associated with Syndromic X-Linked Intellectual Disability 34 is NONO (Non-POU Domain Containing Octamer Binding), and among its related pathways/superpathways are Embryonic and Induced Pluripotent Stem Cells and Lineage-specific Markers and Mesenchymal Stem Cells and Lineage-specific Markers. Affiliated tissues include cerebellum and brain, and related phenotypes are relative macrocephaly and delayed speech and language development