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Systemic lupus erythematosus rash on the face
Systemic lupus erythematosus rash on the face


Blood clots
Blood clots


Definition:

Lupus anticoagulants are antibodies against phospholipids (substances in the lining of cells) that prevent blood clotting in a test tube. Persons with these antibodies may have an abnormally high risk of blood clotting.

See also: Antibody



Causes, incidence, and risk factors:

Lupus anticoagulants are usually found in persons with autoimmune diseases, such as systemic lupus erythematosus (SLE).

They may also be found in persons who take certain medications, including phenothiazines, phenytoin, hydralazine, quinine, and the antibiotic amoxicillin.

Persons with inflammatory bowel disease (Crohn's disease and ulcerative colitis ), infections, and certain tumors may have lupus anticoagulants.

Some people have no risk factors for this condition. In some cases, SLE is linked to an increased risk of blood clots and may be the cause of recurrent miscarriages.



Symptoms:
  • Blood clots
  • Recurrent miscarriages

There may be no symptoms.



Signs and tests: The following tests may be done:

Treatment:

No treatment is required when there are no symptoms. If clots occur, your health care provider may prescribe blood thinners (heparin followed by warfarin). Higher-than-usual doses of warfarin may be needed.



Support Groups:



Expectations (prognosis):

The outcome is usually good with appropriate therapy. Some patients have difficult-to-control clots with recurrent symptoms.



Complications:

Calling your health care provider:

Call your health care provider if you notice symptoms of a blood clot, which include swelling or redness in the leg, shortness of breath, or pain, numbness and pallor in an arm or leg.



Prevention:

Awareness of risk factors may allow early diagnosis. Prevention may not be possible.



References:

Harris ED, Budd RC, Genovese MC, Firestein GS, Sargent JS, Sledge CB. Kelley's Textbook of Rheumatology. 7th ed. St. Louis, Mo: WB Saunders; 2005.




Review Date: 1/12/2009
Reviewed By: Todd Gersten, M.D., Hematology/Oncology, Palm Beach Cancer Institute, West Palm Beach, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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