Other Bleeding Disorders

In addition to deficiencies in Factors VIII and IX, there are numerous other rare clotting factor deficiencies that can cause bleeding problems.

Factor I Deficiency

Also known as Fibrinogen deficiency, afibrinogenemia, dysfibrinogenemia, or hypofibrinogenemia. Factor I deficiency is a collective term for several rare inherited fibrinogen deficiencies. Fibrinogen may be absent from the blood altogether (afibrinogenemia), present in only very low levels in the blood (hypofibrinogenemia), or measurable in normal quantities but defective (dysfibrinogenemia).

Factor II Deficiency

Also known as prothrombin deficiency.

Factor V Deficiency

Also known as Owren’s disease, labile Factor deficiency, proaccelerin deficiency or parahemophilia.

Factor VII Deficiency

Also known as Alexander’s disease, stable Factor deficiency, or proconvertin deficiency.

Factor X Deficiency

Also known as Stuart-Prower Factor Deficiency.

Factor XI Deficiency

Can also be known as Hemophilia C, Plasma Thromboplastin Antecedent (PTA) Deficiency, Rosenthal Syndrome.

Factor XII Deficiency

Also known as Hageman Factor deficiency.


The on-site Hemostasis Thrombosis Lab provides timely testing and reporting on these Rare Factor Deficiencies.

Your donation to our Foundation will help us make a difference.

Sign up for eNews and Events