non-syndromic X-linked intellectual disability 77

A non-syndromic X-linked intellectual disability characterized by moderate to severe intellectual disability, severe speech problems and aggressive behavior that has_material_basis_in hemizygous mutation in a region on chromosome Xq12-q21.3.

Signs and symptoms

• Febrile seizure (within the age range of 3 months to 6 years)
• Hyperactivity
• Intellectual disability

Also known as: MRX77; X-linked mental retardation 77