progesterone receptor negative

Definition / meaning of progesterone receptor negative

Describes cells that do not have a protein to which the hormone progesterone will bind. Cancer cells that are progesterone receptor negative do not need progesterone to grow, and usually do not stop growing when treated with hormones that block progesterone from binding. Also called PR-.

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Find More About 'progesterone receptor negative'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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