---
title: "Breast Cancer in Your 20s, 30s and Under 50"
description: "Can you get breast cancer in your 20s or 30s? Risk, BRCA genes, dense tissue, fertility and why breast awareness still matters. Ask your GP about referral."
url: https://breastcancer-charity.org/about-breast-cancer/breast-cancer-in-young-women/
robots: noindex
---

# Breast Cancer in Your 20s, 30s and Under 50

Breast health information

Can you get breast cancer in your 20s or 30s? Risk, BRCA genes, dense tissue, fertility and why breast awareness still matters. Ask your GP about referral.

## Quick answer

Although breast cancer is more common after 50, around 20% of cases in the UK occur in women under 50. Cancers in younger women may behave differently and need careful specialist management.

**Your next step:** see a GP (or your doctor, if you live outside the UK) about any new breast or chest change. These guides explain general information; your care team can advise on your own situation.

**Content updated:** 28 May 2026 .

Independent clinical review has not yet been recorded for this page.

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At a glance

Around 20% of UK breast cancers are diagnosed in women under 50 Breast cancers in young women are more likely to be high-grade or triple-negative Genetic testing should be considered after a diagnosis under 40 Fertility preservation should be discussed before starting chemotherapy

## How common is breast cancer in young women?

Breast cancer in women under 40 is rare, accounting for around 5% of UK cases. In women aged 40–49, it accounts for around 15% of cases. Together, women under 50 account for roughly 20% of all breast cancer diagnoses in the UK each year — around 11,000 women.

## Why it can be different

Breast cancers in younger women are more likely to be high-grade and hormone receptor-negative (including triple-negative). They are also more likely to be associated with [BRCA1](https://breastcancer-charity.org/about-breast-cancer/breast-cancer-genes-and-family-history/) or BRCA2 gene mutations. Because younger women are not routinely screened by [mammogram](https://breastcancer-charity.org/about-breast-cancer/breast-cancer-screening/) in the UK, their cancers are more likely to be self-detected or found incidentally, sometimes at a later stage.

Dense breast tissue — which is more common in younger women — makes mammograms less effective. MRI is more sensitive and is used for high-risk young women.

## Genetics and family history

A diagnosis of breast cancer under 40 significantly raises the probability of an inherited gene mutation. Women diagnosed young should discuss genetic referral with their oncologist. If a BRCA mutation is identified, family members may also wish to be tested.

## Fertility and treatment

Many chemotherapy regimens carry a risk of temporary or permanent fertility effects. If you may wish to have children in the future, it is very important to discuss fertility preservation before starting chemotherapy. Options include embryo or egg freezing. In the UK, this should be offered as part of the treatment planning process.

## Life with breast cancer under 50

A breast cancer diagnosis can affect young women's lives in particular ways — career, relationships, fertility, identity and the menopause effects of treatment. Specialist nurses, psychological support, and peer support groups are important parts of comprehensive care.

## Frequently asked questions

Can young women get breast cancer? Yes, though it is less common. Breast cancer in women under 40 accounts for around 5% of UK cases. In women aged 40–49, it accounts for around 15%. Altogether, women under 50 represent roughly 20% of UK diagnoses. Young women are not routinely screened, so most find their cancer themselves — making breast awareness especially important in this age group. Is breast cancer in young women more aggressive? Breast cancers in younger women are more likely to be high-grade and hormone receptor-negative (including triple-negative), which can mean they grow faster. They are also more likely to be associated with BRCA gene mutations. However, outcomes depend on the specific tumour characteristics and stage at diagnosis — not age alone. Can breast cancer treatment affect fertility? Some chemotherapy regimens carry a risk of temporary or permanent effects on fertility. If you may wish to have children in the future, it is very important to discuss fertility preservation with your oncology team before starting chemotherapy. Options include embryo or egg freezing. This should be offered as part of treatment planning in the UK. Can you get breast cancer in your 20s or 30s? Yes, though it is uncommon. Breast cancer under 30 is rare, accounting for less than 1% of UK cases. In women in their thirties, it accounts for around 4% of cases. Because young women are not routinely invited for NHS mammography screening, it is vital that they are breast aware and see a GP promptly with any new or unusual change. Women with a strong family history or known BRCA gene mutation should discuss earlier, more frequent screening with their GP.

## Sources and further reading

- [Cancer Research UK: breast cancer incidence statistics](https://www.cancerresearchuk.org/health-professional/cancer-statistics/statistics-by-cancer-type/breast-cancer/incidence-invasive)
- [NHS inform: breast cancer in women](https://www.nhsinform.scot/illnesses-and-conditions/cancer/cancer-types-in-adults/breast-cancer-in-women/)
- [NICE NG101: tumour profiling and genetic testing](https://www.nice.org.uk/guidance/ng101/chapter/Recommendations#assessment-of-tumour-profile-and-genetic-testing)
- [NICE CG164: genetic testing for familial breast cancer](https://www.nice.org.uk/guidance/cg164/chapter/Recommendations#genetic-testing)
- [NICE NG257: fertility problems, including fertility preservation](https://www.nice.org.uk/guidance/ng257)
- [NHS inform: fertility and cancer](https://www.nhsinform.scot/illnesses-and-conditions/cancer/practical-issues/fertility-and-cancer/)

This content is for educational purposes and does not constitute medical advice. Always consult a qualified healthcare professional for personal medical guidance. Source links do not imply endorsement by the NHS or another organisation. See our [editorial policy](https://breastcancer-charity.org/editorial-policy/).

## Keep reading

[Support ### Where can I get breast cancer support in the UK?](https://breastcancer-charity.org/breast-cancer-support/) [⚠️ ### What causes breast cancer and who is at risk?](https://breastcancer-charity.org/about-breast-cancer/breast-cancer-causes-and-risk-factors/)[🧬 ### Is breast cancer hereditary?](https://breastcancer-charity.org/about-breast-cancer/breast-cancer-genes-and-family-history/)[⚡ ### What is triple-negative breast cancer?](https://breastcancer-charity.org/about-breast-cancer/triple-negative-breast-cancer/)