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progesterone receptor positive [also called PR+]

(pro-JES-ter-own Ree-SEP-ter POZ-ih-tiv)

Breast cancer cells that have a special receptor protein to which progesterone will attach. Breast cancer cells that are PR+ depend on the hormone progesterone to grow, and usually respond to hormonal therapy.

Read more about hormone receptor status.

Audio contributed by: Linda Ellerbee

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