Factor X deficiency Factor X deficiency is a disorder caused by
too little of a protein called factor X in the blood. It leads
to problems with blood clotting (coagulation). When you bleed,
the body launches a series of reactions that help the blood
clot. This is called the coagulation cascade. The process
involves special proteins called coagulation factors. When one
or more of these clotting factors are missing, there is usually
a higher chance of bleeding. Factor X deficiency is often caused
by a defect of the factor X gene that is passed through
families. This is called inherited factor X deficiency. Bleeding
ranges from mild to severe. Factor X deficiency may also develop
due to another condition or use of medications. This is called
acquired factor X deficiency. Acquired factor X deficiency is
common. It may be caused by a lack of vitamin K, amyloidosis,
severe liver disease, and use of drugs that prevent clotting
(anticoagulants such as warfarin or Coumadin). Some newborns are
born with vitamin K defic