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John H. Healey, Chief, Orthopaedic Service, and a nurse
John H. Healey, Chief, Orthopaedic Service, and Jody Roth, RN

Primary bone cancer, which means cancer that begins in bone tissue, is rare. According to the American Cancer Society, approximately 2,570 new cases of primary bone cancer will be diagnosed in 2005 -- a figure that represents less than 0.2 percent of all cancers.

Primary bone cancer can grow in any of the 206 bones of the adult human body, but it occurs most often in the long bones of the arms and legs. Although bone cancer can present itself at any age, the most common types occur in children and young adults. Bone cancers form in the cells that make hard bone tissue. Cancers that arise in the cells produced in the bone marrow, such as leukemia, multiple myeloma, and lymphoma, are not considered bone cancers, although they do affect the bone and may require orthopaedic management.

Benign (noncancerous) bone tumors are more common than malignant (cancerous) ones. Although benign tumors do not spread and are rarely life threatening, both types may grow and compress healthy bone tissue and absorb or replace it with abnormal tissue.

Edward Athanasian, MD
Edward Athanasian, MD
  • Osteosarcoma

    Osteosarcoma is the most common type of primary bone cancer, making up 35 percent of bone cancer cases. This cancer affects primarily children and young adults between the ages of ten and 25. Osteosarcoma often starts in the ends of bones, where new tissue forms as children grow. It occurs most often in the knee.

  • Chondrosarcoma

    Chondrosarcomas, one of the most common types of bone cancer in adults over age 50, form in cartilage -- usually around the pelvis, knee, shoulders, or upper part of the thighs. These cancers make up 26 percent of all bone cancer cases.

  • Ewing's Sarcoma

    Ewing's sarcoma occurs most often in the middle part of bones, arising most often in the hip, ribs, upper arm, and thighbones. Like osteosarcoma, this cancer affects primarily children and young adults between the ages of ten and 25. Ewing's sarcoma is responsible for 16 percent of bone cancer cases.

  • Rarer Bone Cancers

    The following types of bone cancer are rare, and occur primarily in adults:

    1. Fibrosarcomas usually appear in the knee or hip area. They can arise in older patients after radiation therapy for other cancers.
    2. Giant cell tumors, which usually begin in the knee, affect young adults most frequently, and women more often than men.
    3. Adamantinomas usually occur in the shinbone.
    4. Chordomas are found most often in the sacrum, which is the lower part of the spine, also known as the tailbone.

Metastatic Cancer to Bone

Metastatic cancer to bone -- cancer that starts somewhere else in the body and then spreads to the bone -- is much more common than primary bone cancer. Although any type of cancer can spread to the bone, the most common types are those of the breast, lung, kidney, thyroid, and prostate. Bone metastases most often arise in the hip, femur (thighbone), shoulder, and spine. Like other types of cancer, those that start in the bone can also spread to other parts of the body.


Last Updated: Feb. 8, 2006
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