NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,990 terms related to cancer and medicine.

progesterone receptor positive
(proh-JES-teh-rone reh-SEP-ter PAH-zih-tiv)
Describes cells that have a protein to which the hormone progesterone will bind. Cancer cells that are progesterone receptor positive need progesterone to grow and will usually stop growing when treated with hormones that block progesterone from binding. Also called PR+.