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7q11.23 duplication syndrome is a chromosome abnormality characterized by a variety of neurological and behavioral differences. It is caused by a small amount of additional (duplicated) genetic material from chromosome 7. Symptoms may include: motor, speech and language delay, behavior problems, intellectual disability, low muscle tone (hypotonia), an increased head circumference (macrocephaly), facial dysmorphism, seizures, brain abnormalities, and heart defects such as enlargement of the blood vessel that carries blood from the heart to the rest of the body (aortic dilatation). 7q11.23 duplication syndrome is caused by a duplication of genetic material on the long (q) arm of chromosome 7. Some cases of 7q11.23 duplication syndrome are inherited in an autosomal dominant manner; however, the majority of affected individuals have a new ( de novo ) duplication. While there is no cure for 7q11.23 duplication, treatment options will depend on the type and severity of symptoms present and may involve several specialists.
Source: GARD Last updated on 05-01-20
Duplication Cares , a non-profit organization, provides information on 7q11.23 duplication syndrome
Last updated on 04-27-20
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