Factor XII deficiency
Factor XII deficiency is an inherited disorder with no symptoms. Factor XII is a protein involved in blood clotting. A deficiency of this factor does not cause abnormal bleeding in the affected person, but the blood takes longer than normal to clot in a test tube.
There are usually no symptoms.
Factor XII deficiency is a rare hereditary disorder. It is usually found when clotting tests are done for routine screening. It is not associated with abnormal bleeding.
This is an inherited disorder. There is no known way to prevent it.
* Abnormal factor XII assay * Prolonged partial thromboplastin time
The outcome is expected to be good without treatment.
Treatment is generally unnecessary.
This condition is usually discovered by the health care provider, when prolonged clotting is noticed in the process of running other laboratory tests.