Health Care Encyclopedia
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Factor XII (Hageman factor) deficiencyDefinition: This is an inherited disorder with no symptoms. It�does not cause abnormal bleeding in the affected person, but the blood takes longer than normal to clot (coagulate) in a test tube.�It results from a deficiency of the plasma protein factor XII.
Causes, incidence, and risk factors: Factor XII deficiency is a rare hereditary disorder that is usually found when clotting tests are done for routine screening. It is not associated with abnormal bleeding.
Symptoms: There are usually no symptoms.
Treatment: Treatment is generally unnecessary.
Expectations (prognosis): The outcome is expected to be good without treatment.
Complications: There are usually no complications.
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.
Prevention: This is an inherited disorder. There is no known way to prevent it.
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| Review Date: 4/15/2005
Reviewed By: Rita Nanda, MD, Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, Chicago, IL. Review provided by VeriMed Healthcare Network.
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