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Chromosome 21, tetrasomy 21q: A rare chromosomal disorder where there is four copies of the long arm of chromosome 21 instead of the normal two which results in various physical and mental anomalies. More detailed information about the symptoms, causes, and treatments of Chromosome 21, tetrasomy 21q is available below.
See full list of 33 symptoms of Chromosome 21, tetrasomy 21q
Read more about causes of Chromosome 21, tetrasomy 21q.
Research the causes of these diseases that are similar to, or related to, Chromosome 21, tetrasomy 21q:
Types of Chromosome 21, tetrasomy 21q
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Chromosome 21, tetrasomy 21q is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Chromosome 21, tetrasomy 21q, or a subtype of Chromosome 21, tetrasomy 21q,
affects less than 200,000 people in the US population.
Source - National Institutes of Health (NIH)
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