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These medical condition or symptom topics may be relevant to medical information for Duplication 4q21:
Duplication 4q21 is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Duplication 4q21, or a subtype of Duplication 4q21,
affects less than 200,000 people in the US population.
Source - National Institutes of Health (NIH)
Ophanet, a consortium of European partners,
currently defines a condition rare when if affects 1 person per 2,000.
They list Duplication 4q21 as a "rare disease".
Source - Orphanet
Source - NIH
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