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Phenotypic variability of a distinct deletion in McLeod syndrome

Marcelo Miranda, Claudia Castiglioni, Beat M Frey, Martin Hergersberg, Adrian Danek, Hans H Jung
Movement Disorders: Official Journal of the Movement Disorder Society 2007 July 15, 22 (9): 1358-61
The X-linked McLeod neuroacanthocytosis syndrome strongly resembles Huntington's disease and has been reported in various countries world-wide. Herein, we report two Chilean brothers with predominant psychiatric features at disease onset including schizophrenia-like psychosis and obsessive compulsive disorder. Molecular genetic analysis revealed a small deletion in the XK gene (938-942delCTCTA), which has been already described in a North American patient of Anglo-Saxon descent and a Japanese family, presenting with seizures, muscle atrophy or chorea yet absence of psychiatric features. These findings argue against a founder effect and indicate a profound phenotypic variability associated with the 938-942delCTCTA deletion. Our report supports the inclusion of McLeod syndrome in the differential diagnosis of Huntington's disease as well as acute psychosis in male subjects.


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