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Cancer Health Center

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Waldenström's Macroglobulinemia

It is possible that the main title of the report Waldenström's Macroglobulinemia 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.


  • macroglobulinemia
  • Waldenstrom's syndrome

Disorder Subdivisions

  • None

General Discussion

Waldenström's macroglobulinemia (WMG) is a malignant disorder of the blood, a type of lymphoma and characterized by the presence of abnormally large numbers of a particular kind of white blood cell known as B lymphocytes. As these cells accumulate in the body, excessive quantities of an antibody known as IgM are produced. Large amounts of IgM causes the blood to become thick (hyperviscosity) and affects the flow of blood through the smaller blood vessels, leading to the symptoms of the disorder. The organs fed by these small blood vessels do not receive sufficient blood and oxygen, potentially resulting in partial or complete failure of the organ.


American Cancer Society, Inc.
250 Williams NW St
Ste 6000
Atlanta, GA 30303
Tel: (404)320-3333
Tel: (800)227-2345
TDD: (866)228-4327

NIH/National Heart, Lung and Blood Institute
P.O. Box 30105
Bethesda, MD 20892-0105
Tel: (301)592-8573
Fax: (301)251-1223

National Cancer Institute
6116 Executive Blvd Suite 300
Bethesda, MD 20892-8322
Tel: (301)435-3848
Tel: (800)422-6237
TDD: (800)332-8615

International Waldenstrom's Macroglobulinemia Foundation
6144 Clark Center Ave.
Sarasota, FL 34238
Tel: (941)927-4963
Fax: (941)927-4467

Rare Cancer Alliance
1649 North Pacana Way
Green Valley, AZ 85614

Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg, MD 20898-8126
Tel: (301)251-4925
Fax: (301)251-4911
Tel: (888)205-2311
TDD: (888)205-3223

Madisons Foundation
PO Box 241956
Los Angeles, CA 90024
Tel: (310)264-0826
Fax: (310)264-4766

Friends of Cancer Research
1800 M Street NW
Suite 1050 South
Washington, DC 22202
Tel: (202)944-6700

American Society of Clinical Oncology
2318 Mill Road Suite 800
Alexandria, VA 22314
Tel: (571)483-1780
Fax: (571)366-9537
Tel: (888)651-3038

Cancer Support Community
1050 17th St NW Suite 500
Washington, DC 20036
Tel: (202)659-9709
Fax: (202)974-7999
Tel: (888)793-9355

Lance Armstrong Foundation
2201 E. Sixth Street
Austin, TX 78702
Tel: (512)236-8820
Fax: (512)236-8482
Tel: (877)236-8820

For a Complete Report:

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 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 or email

Last Updated: 3/20/2012
Copyright 1988, 1989, 1990, 1993, 1995, 1997, 1998, 2002, 2006, 2008, 2012 National Organization for Rare Disorders, Inc.

WebMD Medical Reference from the National Organization for Rare Disorders

Last Updated: May 28, 2015
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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