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?:definition
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A rare partial autosomal trisomy/tetrasomy with incomplete penetrance and variable expression. The syndrome has characteristics of macrocephaly, developmental delay, intellectual disability, psychiatric disturbances (autism spectrum disorder, attention deficit hyperactivity disorder, schizophrenia, mood disorders) and mild facial dysmorphism (high forehead, hypertelorism). Other associated features include congenital heart defects, hypotonia, short stature, scoliosis.
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