What is the first treatment for breast cancer?

A biopsy confirms the diagnosis and provides information about the cancer cells. Imaging helps the team understand the breast and nearby tissue. Some cancers are removed first with breast-conserving surgery or mastectomy. Others are treated with medicines before surgery to shrink the tumour or test how it responds. The plan can include chemotherapy, hormone treatment, or targeted treatment when the tumour has features that those medicines can address.

A gene expression test may help estimate whether chemotherapy is useful for some breast cancers. This is different from a biopsy, which establishes what the lump contains. Treatment may then continue after surgery to lower the chance of cancer returning.

Take your biopsy and imaging reports to the breast cancer team and ask which findings determine the order of treatment. Ask whether another scan or a gene expression test is needed before deciding. If treatment could affect future fertility, discuss preservation before medicines begin. You can also ask about reconstruction when surgery is being planned.

Arrange prompt specialist follow-up after a confirmed diagnosis so staging and treatment planning can proceed. Seek urgent medical help for heavy bleeding, severe breathlessness, new weakness, or rapidly worsening pain. During treatment, report fever, signs of infection, or an allergic reaction immediately to your care team.

Which tumour features and stage are guiding my first treatment? Is surgery first, or would medicines before surgery be safer or more useful? What results are still pending, and how could they change the plan? What side effects need same-day advice?