PR+

Definition / meaning of PR+

Describes cells that have a protein to which the hormone progesterone will bind. Cancer cells that are PR+ need progesterone to grow and will usually stop growing when treated with hormones that block progesterone from binding. Also called progesterone receptor positive.

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Find More About 'PR+'

Source(s):

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

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