Cancer guide
Breast cancer
The most common cancer in women — highly treatable when caught early, with treatment shaped by hormone receptor and HER2 status.
Symptoms of breast cancer
Early signs, which ones need a same-week doctor visit, and what screening looks like.
Read the symptoms guideWhat to ask after a breast cancer diagnosis
The questions that shape treatment — biomarkers, staging, surgery, chemo, second opinions.
Read the questions guideWhat to know first
- About 1 in 8 women in the US will be diagnosed in their lifetime.
- Screening mammograms are recommended starting at 40 for average risk.
- Hormone receptor (ER/PR) and HER2 status shape every treatment decision.
When to see a doctor
- A new lump or thickening in the breast or armpit
- Skin dimpling, nipple retraction, or unusual discharge
- Any breast change that persists more than one cycle
Related guides
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