Definition of Adducted thumbs with mental retardation
Adducted thumbs with mental retardation: A syndrome with the following characteristic features:
The syndrome is inherited as an X-linked trait and so affects mainly boys. Alternative names include MASA syndrome (MASA stands for mental retardation, aphasia, shuffling gait, and adducted thumbs), clasped thumb and mental retardation, congenital clasped thumb with mental retardation, and the Gareis-Mason syndrome.
Last Editorial Review: 6/14/2012
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