non-syndromic X-linked intellectual disability 89

A non-syndromic X-linked intellectual disability characterized by severe developmental delay that has_material_basis_in heterozygous mutation in a region on chromosome Xp11.3.

Signs and symptoms

• Delayed speech and language development
• Global developmental delay
• Intellectual disability
• Generalized myoclonic seizure

Also known as: MRX89; X-linked mental retardation 89