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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



primary cancer  listen  (PRY-mayr-ee KAN-ser)

  A term used to describe the original, or first, tumor in the body. Cancer cells from a primary cancer may spread to other parts of the body and form new, or secondary, tumors. This is called metastasis. These secondary tumors are the same type of cancer as the primary cancer. Also called primary tumor.