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It is possible that the main title of the report Acquired Hemophilia is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Acquired hemophilia is a rare autoimmune disorder characterized by bleeding that occurs in patients with a personal and family history negative for hemorrhages. Autoimmune disorders occur when the body's immune system mistakenly attacks healthy cells or tissue. In acquired hemophilia, the body produces antibodies (known as inhibitors) that attack clotting factors, most often factor VIII. Clotting factors are specialized proteins required for the blood to clot normally. Consequently, affected individuals develop complications associated with abnormal, uncontrolled bleeding into the muscles, skin and soft tissue and during surgery or following trauma. Specific symptoms can include nosebleeds (epistaxis), bruising throughout the body, solid swellings of congealed blood (hematomas), blood in the urine (hematuria) and gastrointestinal or urogenital bleeding. Acquired hemophilia can potentially cause severe, life-threatening bleeding complications in severe cases. In approximately 50% of cases, there is an identifiable underlying clinical condition; in the other 50% no cause is known (idiopathic).
Acquired hemophilia is different from congenital hemophilia, a group of rare genetic disorders caused by congenital deficiency of certain clotting factors. The main form of hemophilia is hemophilia A (classic hemophilia), which is an X-linked disorder that fully affects males only. It is caused by deficiency or inactivation of factor VIII, the same clotting factor that is affected in most cases of acquired hemophilia. Although both disorders involve deficiency of the same clotting factor, the bleeding pattern is quite different. The reason the bleeding patterns differ between these disorders is not fully understood.
National Hemophilia Foundation
116 West 32nd Street, 11th Floor
New York, NY 10001
Canadian Hemophilia Society
400-1255 University Street
Quebec, H3B 3B6
NIH/National Heart, Lung and Blood Institute
P.O. Box 30105
Bethesda, MD 20892-0105
World Federation of Hemophilia
1425 René Lévesque Blvd. W. Suite 1010
Quebec, Intl H3G 1T7
Tel: +1 (514) 875-7944
Fax: +1 (514) 875-8916
Children's Cancer & Blood Foundation
333 East 38th Street, Suite 830
New York, NY 10016-2745
Hemophilia Federation of America
210 7th St. SE
Washington, DC 20003
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
Irish Haemophilia Society
Tel: +353 (0)1 657 99 00
Fax: +353 (0)1 657 99 01
This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email firstname.lastname@example.org
Last Updated: 3/27/2012
Copyright 2012 National Organization for Rare Disorders, Inc.
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