- X-linked mental retardation-hypotonic facies syndrome-1 [DOID:0080982]
A syndromic X-linked intellectual disability that is characterized primarily by severe mental retardation, dysmorphic facies, and a highly skewed X-inactivation pattern in carrier women and that has_material_basis_in mutation in the ATRX gene. X-linked mental retardation-hypotonic facies syndrome comprises several syndromes previously reported separately. These include Carpenter-Waziri, Holmes-Gang, and Smith-Fineman-Myers syndromes. X-linked alpha-thalassemia/mental retardation syndrome is an allelic disorder with a similar phenotype with the addition of alpha-thalassemia and Hb H inclusion bodies in erythrocytes.
- leukocyte adhesion deficiency 2 [DOID:0080492]
A leukocyte adhesion deficiency that is characterized by the absence of Sialyl Lewis X of E-selectin resulting in recurrent bacterial infections, severe growth delay and severe intellectual deficit.
- X-linked spinocerebellar ataxia 3 [DOID:0111831]
An X-linked cerebellar ataxia characterized by onset in infancy of hypotonia, ataxia, sensorineural deafness, developmental delay, esotropia, and optic atrophy with X-linked inheritance.