Monarch Disease Ontology id MONDO_0010407 (intellectual disability, X-linked syndromic, Turner type) is an X-linked syndromic intellectual disability characterized by moderate to severe intellectual deficit in boys and moderate intellectual deficit in girls. It has been described in 14 members from four generations of one family. Macrocephaly was reported and holoprosencephaly may also be present (two family members). The mode of transmission is X-linked semi-dominant. Also known as: Brooks Wisniewski Brown syndrome, Brooks-Wisniewski-Brown Syndrome, Brooks-Wisniewski-Brown syndrome, MRXST, X-linked intellectual disability, Brooks type, X-linked intellectual disability, Turner type, mental retardation and macrocephaly syndrome, mental retardation, X-linked, syndromic, Turner type.