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Ewing Sarcoma

National Organization for Rare Disorders, Inc.


It is possible that the main title of the report Ewing Sarcoma 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.


  • EFT
  • Ewing family of tumors
  • Ewing tumor
  • Ewing's Sarcoma
  • TEF
  • tumor of the Ewing family (TEF)

Disorder Subdivisions

  • Askin's tumor
  • Ewing sarcoma of bone
  • extraosseous Ewing (EOE) sarcoma
  • primitive neuroectodermal tumor (PNET)

General Discussion

Ewing sarcoma is a rare bone tumor that occurs most often in adolescents. It can also arise outside of the bone in soft tissue (extraosseous Ewing sarcoma). Ewing sarcoma is related to another type of tumor known as primitive neuroectodermal tumor (PNET). Researchers have learned that these tumors are associated with the same chromosomal abnormality (balanced reciprocal translocation) and share many physiological characteristics. Consequently, these tumors are sometimes collectively classified as the Ewing family of tumors (EFT). This general term encompasses Ewing sarcoma of bone, extraosseous Ewing sarcoma, primitive neuroectodermal tumor, and Askin's tumor (a tumor of the chest wall). Ewing sarcoma of bone accounts for approximately 70 percent of the tumors in this family. Generally, the term Ewing sarcoma is preferred because, despite the different names, it is one tumor, molecularly. Ewing sarcoma of bone most often affects the long bone of the legs (femur) and flat bones such as those found in the pelvis and chest well. Ewing sarcoma is an aggressive cancer that may spread (metastasize) to the lungs, other bones, and bone marrow potentially causing life-threatening complications. The exact cause of these tumors is unknown.

Ewing sarcoma was first described in the medical literature in 1921 by Dr. James Ewing. Ewing sarcoma is the second most common primary bone tumor in children and accounts for approximately 2% of all childhood cancer diagnoses.

NORD's report on Ewing sarcoma is a detailed summary of the main aspects of this rare disorder. The National Cancer Institute offers comprehensive, in-depth information on this disorder, which is available at,

For patients:

For healthcare professionals:


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


National Cancer Institute

6116 Executive Blvd Suite 300

Bethesda, MD 20892-8322


Tel: (301)435-3848

Tel: (800)422-6237

TDD: (800)332-8615



National Coalition for Cancer Survivorship

1010 Wayne Avenue

7th Floor

Silver Spring, MD 20910

Tel: (301)650-9127

Fax: (301)565-9670

Tel: (888)650-9127



OncoLink: The University of Pennsylvania Cancer Center Resource

3400 Spruce Street

2 Donner

Philadelphia, PA 19104-4283


Tel: (215)349-8895

Fax: (215)349-5445



Sarcoma Foundation of America

9899 Main Street Ste 204

Damascus, MD 20872


Tel: (301)253-8687

Fax: (301)253-8690



Sarcoma Alliance

775 E. Blithedale #334

Mill Valley, CA 94941


Tel: (415)381-7236

Fax: (415)381-7235



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


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




76 Ellsworth Street

San Francisco, CA 94110

Tel: (415)826-0474



Northwest Sarcoma Foundation

P.O. Box 91460

Portland, OR 97291

Tel: (503)954-5740



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:  1/14/2013

Copyright  1990, 1995, 1997, 1998, 2005, 2013 National Organization for Rare Disorders, Inc.

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