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A deletion of the long (q) arm of chromosome 18 near one end of the chromosome. Manifestations of this disorder are varied and can commonly include short stature, hypotonia, hearing loss, clubfoot or rocker-bottom feet, eye movement disorders and other vision problems, cleft palate, hypothyroidism, congenital heart defects, kidney problems, genital and skin abnormalities. Most cases are the result of a de novo deletion and are not inherited.
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