Testing & Diagnosis for Fibrosarcoma in Children

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How is fibrosarcoma diagnosed?

Your child's doctor may recommend the some or all of the following tests:

  • X-ray - X-rays are very useful in the diagnosis of bone tumors. They are the first diagnostic study, and they often give your doctor information regarding the need for further testing.
  • Magnetic resonance imaging (MRI) - This test outlines the extent of the tumor within the bone and joint and the relationship of the tumor to the muscles, nerves and blood vessels.
  • Computerized tomography scan (also called a CT or CAT scan) - A CT scan shows detailed images of any part of the body, including the bones, muscles, fat, and organs. CT scans are more detailed than general x-rays.
  • Bone scans - A nuclear imaging method used to detect bone and metastatic tumors. Bone scans can determine if there are abnormalities in other bones. This test does not distinguish between tumor, infection or fractures.
  • Complete blood count (CBC) - A measurement of size, number, and maturity of different blood cells in a specific volume of blood.
  • Biopsy of the tumor - A small tissue sample of the tumor is surgically removed and examined under a microscope. This procedure enables your doctor to establish the diagnosis and distinguishes fibrosarcoma from other sarcomas. Biopsy also helps your doctor determine how aggressive the tumor is.


Once fibrosarcoma has been diagnosed, the tumor is staged. This process shows how far the tumor has spread from its original location. The stage of the tumor and grade of the tumor (how aggressive the tumor is) suggests which form of treatment is most appropriate, and gives us an idea of the prognosis.

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- Sandra L. Fenwick, President and CEO

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