Fragile X (Martin Bell) syndrome.

Abstract excerpt

Fragile X syndrome is a neurodevelopmental disorder that results from a single gene mutation on the X chromosome. It is the most common genetic cause of learning disability, though many patients remain unrecognized. Fragile X syndrome is characterized phenotypically mainly by a long coarse face, prominent ears and macro-orchidism. Affected individuals are also mentally challenged and may have mitral valve...

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