Does chemotherapy after surgery treat breast cancer?

Surgery removes the breast tumour and, when needed, nearby lymph nodes. Adjuvant chemotherapy is systemic treatment: it travels through the bloodstream to reach cancer cells too small to be found on scans or removed during surgery. Its purpose is to reduce the chance that those cells grow later.

Not everyone with breast cancer needs chemotherapy. The recommendation can depend on the tumour type, its size and grade, lymph-node findings, hormone-receptor and HER2 results, general health, and whether other medicines are likely to help. Chemotherapy may be one part of a plan that also includes radiotherapy, hormone therapy or targeted therapy.

Before treatment, ask for the names of the medicines, the schedule, expected side effects and the contact number for problems between visits. Tell the oncology team about prescriptions, supplements, allergies, pregnancy plans and any heart, kidney or nerve problems. Blood tests are commonly used to check whether it is safe to give the next dose.

Plan practical support for treatment days and keep a simple symptom diary. Nausea medicines and other supportive treatments work best when taken as directed. Report side effects early because the team can often adjust supportive care, timing or doses without abandoning the overall treatment aim.

Call the oncology team urgently for a fever or for chills during chemotherapy, using the temperature threshold they gave you. Immediate assessment is also needed for breathing difficulty, chest pain, confusion, uncontrolled vomiting, severe diarrhoea, inability to drink, unusual bleeding, or swelling of the face or throat. Use emergency services if symptoms are severe or rapidly worsening.

Useful questions include what features of your cancer support chemotherapy, what the treatment is intended to achieve, which alternatives fit your tumour results, how side effects will be prevented, and whether treatment could affect fertility, work or existing health conditions.