The short answer
Hormone receptor status describes whether cancer cells have receptors for estrogen (ER) or progesterone (PR). It is common in breast cancer reports. Receptor-positive cancers may respond to hormone therapy, which is why the result helps guide treatment planning.
Hormone receptor status shows whether cancer cells have receptors for estrogen or progesterone.
It is written as ER (estrogen receptor) and PR (progesterone receptor), positive or negative.
Receptor-positive cancers may respond to hormone therapy.
The result helps guide treatment, not describe how far cancer has spread.
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The full explanation.
The short version
On many breast cancer pathology reports you will see hormone receptor status, usually written as ER and PR. These describe whether the cancer cells carry receptors for the hormones estrogen (ER) and progesterone (PR). The answer helps guide treatment.
What the receptors do
Some cancer cells carry proteins that act like docking points for hormones. When estrogen or progesterone locks into one, it sends a signal that can help the cancer grow. A cancer with these receptors is called hormone receptor positive. A cancer without them is hormone receptor negative.
Your report lists ER and PR separately, each as positive or negative. It may also give the percentage of cells carrying the receptor.
Why status guides treatment
The reason this test matters is that it opens or closes a specific door:
- Receptor positive. The cancer may respond to hormone therapy. That treatment lowers hormone levels, or blocks the receptors so the signal cannot get through. Teams see this as a helpful finding, because it adds a treatment option.
- Receptor negative. The cancer is less likely to respond to hormone therapy. The plan then leans on other treatments, such as chemotherapy. Negative does not mean untreatable. It points the plan in a different direction.
One piece of a larger picture
Hormone receptor status describes the biology of the cancer cells. It does not say how far the cancer has spread. Care teams combine it with other features, such as HER2 status, grade, and stage. No single result decides everything.
What to ask
Ask your care team what your ER and PR status is. Ask whether it makes hormone therapy an option. Ask how it fits with your other results, such as HER2 status. Their reading of your full report is what applies to you.
One more thing worth knowing: hormone receptor status can change over time. If cancer comes back after treatment, your team may repeat the biopsy and retest the receptors.
Sources
Words to know
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Common questions
What does hormone receptor positive mean?
It means the cancer cells have receptors for estrogen, progesterone, or both. These cancers can be fueled by those hormones, and they may respond to hormone therapy that lowers hormone levels or blocks the receptors. Your care team explains what this means for your treatment.
Is hormone receptor positive good or bad?
Receptor-positive status is generally considered favorable because it opens the door to hormone therapy as a treatment option. But status is only one factor among several, and your care team weighs the whole picture.
What does ER and PR mean on my report?
ER stands for estrogen receptor and PR for progesterone receptor. Your report lists each as positive or negative, and sometimes as a percentage of cells that carry the receptor. Together they describe the hormone receptor status.
Does hormone receptor negative mean fewer options?
Receptor-negative cancers are less likely to respond to hormone therapy, so treatment usually focuses on other approaches. Being negative does not mean untreatable — it points the plan in a different direction. Your care team can explain the options.
Questions to ask your doctor
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Your next step
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Sources last checked: 2026-08-11 what this meansLast updated: 2026-08-11Next planned review: 2027-07-14
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Editorial review complete — This page completed Cancer Explained's editorial checks (sources, safety, plain language, duplication). It has not been reviewed by a physician or other healthcare professional.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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