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  • Cancer A-Z

    Whether you or someone you love has cancer, knowing what to expect can help you cope. Here you'll find in-depth information on specific cancer types – including risk factors, early detection, diagnosis, and treatment options.

    • Explore Cancer A-Z
    • Breast Cancer
    • Colon and Rectal Cancer
    • Lung Cancer
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    • All Cancer Types

    Featured Topics

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    • Rare Cancers, Sub-types, and Pre-cancers

    Related Resources

    • Cancer Glossary
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  • Risk, Prevention, & Screening

    You can help reduce your risk of cancer by making healthy choices like eating right, staying active and not smoking. It’s also important to follow recommended screening guidelines, which can help detect certain cancers early.

    • Explore Risk, Prevention, & Screening
    • Find Cancer Early
    • Stay Away From Tobacco
    • Eat Healthy & Get Active
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    • What Causes Cancer?
    • Cancer Facts

    Featured Topics

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  • Treatment & Survivorship

    Whether you want to learn about treatment options, get advice on coping with side effects, or have questions about health insurance, we’re here to help. 

    • Explore Treatment & Survivorship
    • Understanding Your Diagnosis
    • Treatment & Side Effects
    • Survivorship
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    The American Cancer Society offers programs and services to help you during and after cancer treatment. Below are some of the resources we provide. We can also help you find other free or low-cost resources available.

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    What does it take to outsmart cancer? Research. We’ve invested more than $5 billion in cancer research since 1946, all to find more – and better – treatments, uncover factors that may cause cancer, and improve cancer patients’ quality of life.

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    At the American Cancer Society, we’re on a mission to free the world from cancer. Until we do, we’ll be funding and conducting research, sharing expert information, supporting patients, and spreading the word about prevention. All so you can live longer — and better.

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  • Cancer A-Z

Breast Cancer

Whether you or a loved one are worried about developing breast cancer, have just been diagnosed, are going through breast cancer treatment, or are trying to stay well after treatment, this detailed information can help you find the answers you need.

(For information on breast cancer in men, see Breast Cancer in Men.) 

About Breast Cancer

Get basic information about breast cancer, such as what it is, how it starts, the different types, recent stats, as well as new research being done.

Breast Cancer Risk and Prevention

Learn about breast cancer risk factors, both genetic and lifestyle-related, as well as ways to prevent breast cancer.

Breast Cancer Early Detection and Diagnosis

Get detailed information about breast cancer detection through tests such as mammograms, ultrasounds, other imaging tests and biopsies.

Understanding a Breast Cancer Diagnosis

Get the information you need to understand your breast cancer diagnosis, such as the hormone receptor and HER2 status, tumor grade, and cancer stage.

Treating Breast Cancer

If you’ve been diagnosed with breast cancer, learn about your options for treatment here, which may include surgery, radiation, or hormone therapy.

Breast Reconstruction Surgery

Women who have surgery as part of their breast cancer treatment may choose breast reconstruction surgery. Learn about your options and what to expect.

Non-cancerous Breast Conditions

Most breast changes are benign, or non-cancerous. Get details on types of benign breast conditions and if they are linked with a higher risk of cancer.

Living as a Breast Cancer Survivor

Learn more about living as a breast cancer survivor and get information about next steps, follow up care, and ways to look after your health.

Easy Reading

If You Have Breast Cancer

Read this short, simple, guide to help understand the next steps if you or someone you know has just been diagnosed with breast cancer.

Connect with a breast cancer survivor

Reach To Recovery

The American Cancer Society Reach To Recovery® program connects people facing breast cancer – from diagnosis through survivorship – with trained volunteers who are breast cancer survivors. Our volunteers provide one-on-one support through our website and mobile app to help those facing breast cancer cope with diagnosis, treatment, side effects, and more.

This information is possible thanks to people like you.

We depend on donations to keep our cancer information available for the people who need it most.

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Downloadable PDFs

Download free PDFs of our breast cancer information

About and Key Statistics
Causes, Risks, Prevention
Detection and Diagnosis
Understanding Your Diagnosis

Treatment and Side Effects
Breast Reconstruction
Next Steps After Treatment

More Information and Resources

TAKE THE QUIZ
Quiz: How Much do You Know About Breast Cancer?
Read More
Infographic: 7 Tips for Getting a Mammogram
WATCH VIDEOS
Breast Cancer Screening, Testing, and Treatment Videos
READ MORE
Understanding Your Breast Pathology Report
Join Us
Making Strides Against Breast Cancer
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News & Stories

Read More
ACS Breast Cancer Research Highlights
Read More
ACS Breast Cancer Research News
Read More
Latest Breast Cancer News
Read More
Breast Cancer Stories of Hope
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