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Types: hormone-sensitive, HER2, triple-negative

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Chapter 06 · Types: hormone-sensitive, HER2, triple-negative
THE QUESTION

Are all breast cancers the same?

The answer in a few cards.

1 / 7

Not one, but many breast cancers

Two women can have very different breast cancers. The type decides the treatment.

Source: ACS, 2026

2 / 7

Hormone-sensitive

The cells have receptors for female hormones. It is the most common type: about 2 cancers in 3. It is often treated with .

Source: ACS, 2026

3 / 7

HER2-positive

The cells make too much protein, which makes them grow fast. block HER2.

Source: ACS, 2026

4 / 7

Triple-negative

No and no excess . It is often more aggressive and more common in women under 40 and with a mutation.

Source: ACS, 2026

5 / 7

In Mauritania

At the CNO, among 102 patients tested, 35.3% had cancer and 20.6% -positive cancer.

Source: PAMJ, 2025

6 / 7

Luminal A, luminal B

Doctors also speak of “luminal A” and “luminal B”: two forms of cancer, B growing faster.

Source: ACS, 2026

7 / 7

A rare form: inflammatory cancer

The breast becomes red, swollen and warm, often with no lump. It progresses quickly and needs an urgent consultation.

Source: ACS, 2026

DID YOU KNOW?

The share of cancers at the CNO (35.3%) is much higher than the 10 to 15% described in the United States.

Source: PAMJ, 2025 · ACS, 2026

TRUE OR FALSE?

“All breast cancers are treated the same way.”

TRUE OR FALSE?

“Triple-negative cancer is more common in young women.”

KEY POINTS
  • There are several types of breast cancer.
  • The type is known thanks to .
  • cancer is common in Mauritania.
SOURCES FOR THIS CHAPTER

Information based on publications by the WHO, the International Agency for Research on Cancer (IARC), the French National Cancer Institute, the American Cancer Society, the National Cancer Institute, Cancer Research UK and published scientific studies. The information on ROSE does not replace the advice of a health professional.

Chapter complete!

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Sources: ACS, 2026 · PAMJ, 2025

15 stories to understand it all

Pick a question and let the cards guide you.

01To readWhat is breast cancer?Is a lump in the breast always cancer?5 min read02To readThe signsWould you recognise breast cancer?5 min read03To readRisk factorsWhy do some people get breast cancer and others don't?5 min read04To readScreening, by country and ageShould you wait for a sign before getting a test?5 min read05To readDiagnosis and testsThey found a lump: what happens next?5 min read06In progressTypes: hormone-sensitive, HER2, triple-negativeAre all breast cancers the same?5 min read07To readStagesWhat does “stage 2” mean?5 min read08To readTreatmentsHow is breast cancer treated?5 min read09To readLiving with treatment side effectsFatigue, hair, morale: how to get through treatment?5 min read10To readLife afterAnd when treatment is over?5 min read11To readGenetics and BRCAIs breast cancer passed down in families?5 min read12To readBreast cancer in menCan a man get breast cancer?5 min read13To readYoung womenI'm under 40: can it happen to me?5 min read14To readSupporting a loved oneHow can you help someone with breast cancer?5 min read15To readPreventionCan you reduce your risk of breast cancer?5 min read

Information based on publications by the WHO, the International Agency for Research on Cancer (IARC), the French National Cancer Institute, the American Cancer Society, the National Cancer Institute, Cancer Research UK and published scientific studies. The information on ROSE does not replace the advice of a health professional.