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Health Information

Factor V deficiency

Factor V deficiency


Parahemophilia; Owren's disease

Factor V deficiency is a condition that is passed down through families, which affects the ability of the blood to clot.

I Would Like to Learn About:

  • Causes

    Blood clotting is a complex process involving as many as 20 different proteins in blood plasma. These proteins are called blood coagulation factors.

    Factor V deficiency is caused by a lack of Factor V. When certain blood clotting factors are low or missing, your blood does not clot properly.

    Factor V deficiency is rare. It may be caused by:

    • A defective Factor V gene passed down through families (inherited)
    • An antibody that interferes with normal Factor V function

    You can get an antibody that interferes with Factor V:

    • After giving birth
    • After being treated with a certain type of fibrin glue
    • After surgery
    • With autoimmune diseases and certain cancers

    Sometimes the cause is unknown.

    The disease is similar to hemophilia, except bleeding into joints is less common. In the inherited form of Factor V deficiency, a family history of a bleeding disorder is a risk factor.

  • Symptoms

    • Bleeding into the skin
    • Bleeding of the gums
    • Excessive bruising
    • Nosebleeds
    • Prolonged or excessive loss of blood with surgery or trauma
    • Umbilical stump bleeding
  • Exams and Tests

    • Factor V assay
    • Blood clotting tests, including partial thromboplastin time (PTT) and prothrombin time
    • Bleeding time
  • Treatment

    You will be given fresh blood plasma or fresh frozen plasma infusions during a bleeding episode or after surgery. These treatments will correct the deficiency temporarily.

  • Outlook (Prognosis)

    The outlook is good with diagnosis and proper treatment.

  • Possible Complications

    Severe bleeding (hemorrhage) could occur.

  • When to Contact a Medical Professional

    Go to the emergency room or call the local emergency number (such as 911) if you have an unexplained or prolonged loss of blood.

Related Information

  Protein in dietHemophiliaBleeding disorders...    


Ragni MV. Hemorrhagic disorders: coagulation factor deficiencies. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 167.


Review Date: 2/24/2014  

Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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