| Definition: |
This is an inherited disorder that causes prolonged clotting (coagulation) of blood in a test tube without a clinical bleeding tendency, and results from a deficiency of the plasma protein factor XII.
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| Causes, incidence, and risk factors: |
Factor XII deficiency is a hrare ereditary disorder that is usually found when clotting tests are done for routine screening. It is not associated with abnormal bleeding.
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| Symptoms: |
There are usually no symptoms.
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| Signs and tests: |
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| Treatment: |
Treatment is generally unnecessary.
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| Expectations (prognosis): |
The outcome is expected to be good without treatment.
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| Complications: |
There are usually no complications.
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| Calling your health care provider: |
This condition is usually discovered by the health care provider when prolonged clotting is noticed in the process of running other laboratory tests.
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| Prevention: |
This is an inherited disorder. There is no known way to prevent it.
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