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Childhood Soft Tissue Sarcoma Treatment (PDQ®): Treatment - Patient Information [NCI] - Stages of Childhood Soft Tissue Sarcoma

After childhood soft tissue sarcoma has been diagnosed, tests are done to find out if cancer cells have spread to other parts of the body.

The process used to find out if cancer has spread within the soft tissue or to other parts of the body is called staging. There is no standard staging system for childhood soft tissue sarcoma. Two methods that are commonly used for staging are based on the amount of tumor remaining after surgery to remove the tumor and/or the grade and size of the tumor and whether it has spread to the lymph nodes or other parts of the body. It is important to know the stage in order to plan treatment.

The following tests and procedures may be used in the staging process:

  • Sentinel lymph node biopsy may be used to stage childhood soft tissue sarcoma. This is the removal of the sentinel lymph node during surgery. The sentinel lymph node is the first lymph node to receive lymphatic drainage from a tumor. It is the first lymph node the cancer is likely to spread to from the tumor. A radioactive substance and/or blue dye is injected near the tumor. The substance or dye flows through the lymph ducts to the lymph nodes. The first lymph node to receive the substance or dye is removed. A pathologist views the tissue under a microscope to look for cancer cells. If cancer cells are not found, it may not be necessary to remove more lymph nodes.
  • CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.

The results of the sentinel lymph node biopsy and CT scan are viewed together with the results of the diagnostic tests and initial surgery to determine the stage of the soft tissue sarcoma.

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