Primary tumor

A primary tumor is a

Most cancers continue to be called after their primary site, as in breast cancer or lung cancer for example, even after they have spread to other parts of the body. Cancer of unknown primary origin is cancer that is determined to be at the metastatic stage, but a primary tumor cannot be identified.

References

• Weinberg RA (2007). The Biology of Cancer. New York: Garland Science.
  ISBN 978-0-8153-4076-8
  .

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