What is Breast Cancer image

What is Breast Cancer

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HealthTree

Last updated and reviewed on: July 09, 2026

This guide is a comprehensive resource designed to help patients and their loved ones navigate every stage of a breast cancer diagnosis. Learn what breast cancer is, recognize common signs and symptoms, understand risk factors, staging, diagnosis, and treatment options, explore clinical trials, and find practical resources for coping and making informed decisions throughout your care.

Breast Cancer Facts

Learn what breast cancer is, how it starts, and the main subtypes including IDC, ILC, DCIS, triple-negative, HER2-positive, and HR-positive.

Breast Cancer Symptoms

Recognize early signs of breast cancer, including lumps, skin and nipple changes, breast pain, and other warning signs to discuss with your doctor.

Risk Factors for Breast Cancer

Understand breast cancer risk factors, including age, family history, BRCA gene mutations, hormones, breast density, and lifestyle.

How is Breast Cancer Diagnosed?

Learn how breast cancer is diagnosed including biopsy types, imaging, blood work, and key biomarkers including ER/PR, HER2, and BRCA testing.

Breast Cancer Prevention

Learn about breast cancer screening with mammograms, MRI, and ultrasound, plus prevention through chemoprevention and risk-reducing surgery.

Breast Cancer Screening

Learn when to start breast cancer screening, how often to get a mammogram, and when breast MRI or other screening tests may be recommended.

Breast Cancer Stages

A breakdown of breast cancer staging using the TNM system, including Stage 0 through Stage IV, with examples of what each stage means.

Breast Cancer Treatment

Breast cancer treatment options such as surgery, radiation, chemotherapy, hormone therapy, targeted therapies, and immunotherapy explained.

Joining A Clinical Trial for Breast Cancer

Learn how breast cancer clinical trials work, who qualifies, what insurance covers, and how to find a trial that's right for you

Breast Cancer Survival Rates

A patient-friendly look at breast cancer statistics including how common it is, survival rates by stage, and what these numbers actually mean for you.

Breast Cancer Support

Support for coping with breast cancer, including body image, fertility, menopause, mental health, and resources for you and your loved ones.

Questions to Ask Your Doctor About Breast Cancer

Key questions to ask your breast cancer care team about diagnosis, staging, treatment, side effects, clinical trials, and follow-up care.

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