Uniprot Description A disorder characterized by significantly below average general intellectual functioning associated with impairments in adaptive behavior and manifested during the developmental period. MRXS13 patients manifest mental retardation associated with other variable features such as spasticity, episodes of manic depressive psychosis, increased tone and macroorchidism.

Disease Ontology Description A syndromic X-linked intellectual disability characterized by moderate intellectual deficit, manic-depressive psychosis, pyramidal signs and macroorchidism that has_material_basis_in mutation in the MECP2 gene on chromosome Xq28.