Hageman factor deficiency: A congenital blood disorder where there is a deficiency of the Hageman factor (blood factor XII) which is required for blood clotting. Other blood clotting factors compensate for the missing factor so most patients are generally asymptomatic. More detailed information about the symptoms, causes, and treatments of Hageman factor deficiency is available below.
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An absence or reduced level of blood coagulation factor XII. It normally occurs in the absence of patient or family history of hemorrhagic disorders and is marked by prolonged clotting time. - (Source - Diseases Database)
Hageman factor deficiency is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Hageman factor deficiency, or a subtype of Hageman factor deficiency,
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 it affects 1 person per 2,000.
They list Hageman factor deficiency as a "rare disease".
Source - Orphanet
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