Q:

Which of the following statements describes an ideal tumor marker?

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Which of the following statements describes an ideal tumor marker?


  1. The ideal tumor marker should be tumor specific; that is, in the normal population or patients with benign diseases, false-positive test results are rare
  2. The ideal marker must have a low false-negative rate; that means that all patients with a particular type of cancer should test positive.
  3. The circulating level of an ideal tumor marker should correlate directly with the amount of viable tumor and be a measure of the response to therapy
  4. The ideal tumor marker should act as a prognostic indicator.
  5. All of the above.

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E. All of the above.

DISCUSSION: Each of the above is a criterion for an ideal tumor marker. 

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