Hereditary Factor XII Deficiency

Definition 1

A rare autosomal recessive inherited bleeding disorder caused by deficiency of coagulation factor XII. It may be asymptomatic or manifest with bleeding. (NCI Thesaurus)

Definition 2

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. (NLM, Medical Subject Headings)

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