Mental retardation-hypotonic facies syndrome X-linked, 1

Common Name(s)

Mental retardation-hypotonic facies syndrome X-linked, 1, Juberg Marsidi syndrome

The term 'X-linked mental retardation-hypotonic facies syndrome' comprises several syndromes previously reported separately. These include Juberg-Marsidi, Carpenter-Waziri, Holmes-Gang, and Smith-Fineman-Myers syndromes as well as 1 family with X-linked mental retardation with spastic paraplegia. All these syndromes were found to be caused by mutation in the XH2 gene and are characterized primarily by severe mental retardation, dysmorphic facies, and a highly skewed X-inactivation pattern in carrier women ({2:Abidi et al., 2005}). Other more variable features include hypogonadism, deafness, renal anomalies, and mild skeletal defects. X-linked alpha-thalassemia/mental retardation syndrome (ATR-X; {301040}) is an allelic disorder with a similar phenotype with the addition of alpha-thalassemia and Hb H inclusion bodies in erythrocytes.
 

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Scientific Literature

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