Osteosarcoma


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Definition

Osteosarcoma is a cancerous (malignant) bone tumor that usually develops during the period of rapid growth that occurs in adolescence, as a teenager matures into an adult.


Alternative Names

Osteogenic sarcoma


Causes, incidence, and risk factors

Osteosarcoma is the most common cancerous (malignant) bone tumor in kids. The average age at diagnosis is 15. Boys and girls are just as likely to get this tumor until the late teen years, when it is more often seenin boys. Osteosarcoma is also more commonly seen in people over age 60.

The cause is not known. In some cases, osteosarcoma runs in families. At least one gene has been linked to an increased risk. This gene is also associated with familial retinoblastoma, a cancer of the eye that occurs in children.

Osteosarcoma tends to occur in the bones of the:

  • Shin (near the knee)
  • Thigh (near the knee)
  • Upper arm (near the shoulder)

This cancer occurs most commonly in larger bones and in the area of bone with the fastest growth rate. Osteosarcoma can occur in any bone, however.


References

Lerner A, Antman KH. Primary and metastatic malignant bone lesions. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 208.

National Cancer Institute. Osteosarcoma and malignant fibrous histiocytoma of bone treatment PDQ. Updated October 12, 2011.

National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology: Bone Cancer. Version 2.2011.


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Review Date: 12/15/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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