Factor V Clinical Presentation

  • Author: Olga Kozyreva, MD; Chief Editor: Emmanuel C Besa, MD   more...
 
Updated: Jan 10, 2012
 

History

  • Symptoms of factor V deficiency include the following:
    • Bleeding into the skin
    • Excessive bruising with minor injuries
    • Nosebleeds
    • Bleeding gums
    • Excessive menstrual bleeding and prolonged or excessive loss of blood with surgery or trauma
    • Bleeding in mucosal tracts (gastrointestinal, urinary)
    • Hemarthrosis and flexion contracture
    • Bleeding during delivery and postpartum
    • Intracerebral hemorrhages
    • Pulmonary hemorrhage
  • The severity of bleeding symptoms is only partially related to the degree of factor V deficiency in plasma from immeasurable plasma levels.
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Physical

The most common physical findings of factor V deficiency are ecchymoses, bleeding from mucosal surfaces, and pallor secondary to blood loss. Petechiae are uncommon because platelet numbers and function are not affected.

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Causes

Factor V deficiency is caused by a large number of genetic abnormalities. The deficiency is a rare bleeding disorder whose genetic bases have been characterized in only a limited number of cases. The inheritance of factor V deficiency is autosomal recessive, with varying expressivity in the heterozygote; however, other modes of inheritance have been described. Heterozygotes have lowered levels of factor V but probably never bleed abnormally.

Consanguinity has been observed in families with factor V deficiency, related to its autosomal recessive inheritance. Heterozygous deficiency states are generally unrecognized because of a lack of significant clotting time prolongation or bleeding risk.

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Contributor Information and Disclosures
Author

Olga Kozyreva, MD  Attending Physician, Division of Hematology-Oncology, St Elizabeth's Medical Center; Assistant Professor, Tufts University School of Medicine

Disclosure: Nothing to disclose.

Coauthor(s)

Sarah K May, MD  Consulting Staff, Department of Hematology-Oncology, Caritas Carney Hospital, Commonwealth Hematology-Oncology PC

Disclosure: Nothing to disclose.

Karl J D'Silva  MD, Assistant Clinical Professor of Medicine, Department of Hematology/Oncology, Lahey Clinic, Sophia Gordon Cancer Center

Karl J D'Silva is a member of the following medical societies: Massachusetts Medical Society

Disclosure: Nothing to disclose.

Specialty Editor Board

Paul Schick, MD  Emeritus Professor, Department of Internal Medicine, Jefferson Medical College of Thomas Jefferson University; Research Professor, Department of Internal Medicine, Drexel University College of Medicine; Adjunct Professor of Medicine, Lankenau Hospital

Paul Schick, MD is a member of the following medical societies: American College of Physicians, American Heart Association, American Society of Hematology, International Society on Thrombosis and Haemostasis, and New York Academy of Sciences

Disclosure: Nothing to disclose.

Francisco Talavera, PharmD, PhD  Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Medscape Salary Employment

Ronald A Sacher, MB, BCh, MD, FRCPC  Professor, Internal Medicine and Pathology, Director, Hoxworth Blood Center, University of Cincinnati Academic Health Center

Ronald A Sacher, MB, BCh, MD, FRCPC is a member of the following medical societies: American Association for the Advancement of Science, American Association of Blood Banks, American Clinical and Climatological Association, American Society for Clinical Pathology, American Society of Hematology, College of American Pathologists, International Society of Blood Transfusion, International Society on Thrombosis and Haemostasis, and Royal College of Physicians and Surgeons of Canada

Disclosure: Glaxo Smith Kline Honoraria Speaking and teaching; Talecris Honoraria Board membership

Rebecca J Schmidt, DO, FACP, FASN  Professor of Medicine, Section Chief, Department of Medicine, Section of Nephrology, West Virginia University School of Medicine

Rebecca J Schmidt, DO, FACP, FASN is a member of the following medical societies: American College of Physicians, American Medical Association, American Society of Nephrology, International Society of Nephrology, National Kidney Foundation, Renal Physicians Association, and West Virginia State Medical Association

Disclosure: Renal Ventures Ownership interest Other

Chief Editor

Emmanuel C Besa, MD  Professor, Department of Medicine, Division of Hematologic Malignancies, Kimmel Cancer Center, Jefferson Medical College of Thomas Jefferson University

Emmanuel C Besa, MD is a member of the following medical societies: American Association for Cancer Education, American College of Clinical Pharmacology, American Federation for Medical Research, American Society of Clinical Oncology, American Society of Hematology, and New York Academy of Sciences

Disclosure: Nothing to disclose.

References
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Antithrombin sites of action.
Cell surface-directed hemostasis. Initially, a small amount of thrombin is generated on the surface of the tissue factor (TF)–bearing cell. Following amplification, the second burst generates a larger amount of thrombin, leading to fibrin (clot) formation. Adapted from Hoffman and Monroe, Thromb Haemost 2001, 85(6): 958-65.
 
 
 
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