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- Breast cancer develops when abnormal cells in breast tissue grow uncontrollably. There are several biological types, which are treated differently.
- A new lump is a common sign, but skin pulling in, a change in shape, a nipple abnormality, spontaneous discharge or an armpit lymph node may also be the first sign.
- Most breast changes are not cancer. Physical examination, imaging and a biopsy if needed establish the cause.
- Do not wait for screening with a new symptom or be completely reassured by a recent normal mammogram.
- Treatment may include surgery, radiotherapy, hormone therapy, chemotherapy, targeted therapy and sometimes immunotherapy; the combination is individual.
- Early diagnosis and suitable treatment increase the chance of long-term control or cure. Metastatic disease can also often be slowed and symptoms treated.
- Breast cancer may occur in women, men, trans people and people who have previously had breast surgery.
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