Quiz: Diagnosis of Cancer
Question 1 of 3  

What are tumor markers?

  • A.

    Tumor markers are substances that doctors inject into the bloodstream to help them identify cancer.

  • B.

    Tumor markers are substances secreted into the bloodstream by certain tumors.

  • C.

    Tumor markers are commonly used as a cancer screening test.

  • D.

    Tumor markers identify the type of cancer found in a biopsy sample.

Am I correct?