Hyper IgM Syndrome
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Hyper IgM Syndrome 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.
- Dysgammaglobulinemia Type I
- Immunodeficiency with Increased IgM
Hyper-IgM Syndrome (HIM) is a rare genetic (primary) immunodeficiency disorder that is typically inherited as an X-linked recessive genetic trait. Symptoms and physical findings associated with the disorder usually become apparent in the first or second year of life. Hyper-IgM Syndrome may be characterized by recurrent pus-producing (pyogenic) bacterial infections of the upper and lower respiratory tract including the sinuses (sinusitis) and/or the lungs (pneumonitis or pneumonia); the middle ear (otitis media); the membrane that lines the eyelids and the white portions (sclera) of the eyes (conjunctivitis); the skin (pyoderma); and/or, in some cases, other areas. Individuals with Hyper-IgM Syndrome are also susceptible to "opportunistic" infections, i.e., infections caused by microorganisms that usually do not cause disease in individuals with fully functioning immune systems (non-immunocompromised) or widespread (systemic) overwhelming disease by microorganisms that typically cause only localized, mild infections. In individuals with Hyper-IgM Syndrome, such opportunistic infections may include those caused by Pneumocystis carinii, a microorganism that causes a form of pneumonia, or Cryptosporidium, a single-celled parasite (protozoa) that can cause infections of the intestinal tract. In addition, individuals with Hyper-IgM Syndrome are prone to certain autoimmune disorders affecting particular elements of the blood, such as neutropenia, a condition in which there is an abnormal decrease of certain white blood cells (neutrophils). Additional physical findings often associated with the disorder may include enlargement (hypertrophy) of the tonsils, enlargement of the liver and spleen (hepatosplenomegaly), chronic diarrhea and impaired absorption of nutrients by the intestinal tract (malabsorption), and/or other symptoms.
The range and severity of symptoms and physical features associated with this disorder may vary from case to case. Because approximately 70 percent of reported cases of Hyper-IgM Syndrome are inherited as an X-linked recessive genetic trait, the vast majority of affected individuals are male. However, some cases of autosomal recessive and autosomal dominant genetic inheritance have been reported. In addition, a rare acquired form of the disorder has been described in the medical literature.
March of Dimes Birth Defects Foundation
1275 Mamaroneck Avenue
White Plains, NY 10605
American Autoimmune Related Diseases Association, Inc.
22100 Gratiot Ave.
Eastpointe, MI 48021
Immune Deficiency Foundation
40 W. Chesapeake Avenue
Towson, MD 21204
National Neutropenia Network
P.O. Box 1693
Brighton, MI 48116
NIH/National Institute of Arthritis and Musculoskeletal and Skin Diseases
One AMS Circle
Bethesda, MD 20892-3675
NIH/National Heart, Lung and Blood Institute
P.O. Box 30105
Bethesda, MD 20892-0105
Center for International Blood and Marrow Transplant Research
Froedtert and the Medical College of Wisconsin Clinical Cancer Center
9200 W. Wisconsin Avenue
Milwaukee, WI 53226
Neutropenia Support Association, Inc.
971 Corydon Avenue
P.O. Box 243
Manitoba, R3M 3S7
American Academy of Allergy, Asthma and Immunology
611 East Wells Street
Milwaukee, WI 53202
National Bone Marrow Transplant Link
20411 W. 12 Mile Rd
Southfield, MI 48076
International Patient Organization for Primary Immunodeficiencies
Firside Main Road
Cornwall, PL11 3LE
Jeffrey Modell Foundation
780 Third Avenue
New York, NY 10017
Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
PO Box 241956
Los Angeles, CA 90024
European Society for Immunodeficiencies
1-3 rue de Chantepoulet
Geneva, CH 1211
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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
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Last Updated: 4/16/2008
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