What should you know about stages of breast cancer?

Staging commonly considers the size and position of the breast tumour, whether lymph nodes contain cancer cells and whether there is evidence of spread elsewhere. A biopsy confirms the diagnosis and provides information about the tumour. Mammography, breast MRI, ultrasound or sentinel lymph-node biopsy may add detail when appropriate.

Breast cancer is not defined by stage alone. Receptor status, grade, gene-expression results and genomic tumour profiling can affect treatment even when two people have the same stage. A stage describes the extent found at assessment; it does not predict one person’s experience with certainty.

Treatment may include surgery, radiotherapy, hormone treatment, chemotherapy, targeted treatment or a combination. Surgery might remove the tumour while preserving the breast or remove the breast, with lymph-node assessment when needed. The order can depend on tumour size, biology, symptoms, health and personal preferences.

Take someone with you if helpful and ask for copies of pathology and imaging reports. Discuss reconstruction, arm movement, fatigue, fertility, menopause and work before treatment begins. Ask whether a breast cancer gene-expression test or genomic tumour profiling could clarify the value of additional treatment.

Call promptly for fever during treatment, new breathlessness, chest pain, sudden arm swelling, wound redness or drainage, or a new neurological symptom such as weakness, seizure or confusion. Seek emergency help for severe breathing difficulty, collapse, sudden weakness or uncontrolled bleeding. New symptoms deserve assessment without assuming they represent cancer spread.

What are the tumour size, grade and receptor results? Were lymph nodes sampled, and what did they show? Which tests affect the treatment choice? What are the benefits and side effects of each option? How will follow-up and breast or arm symptoms be handled?