progesterone receptor positive

Definition / meaning of progesterone receptor positive

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+.

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Find More About 'progesterone receptor positive'

Source(s):

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

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