Radiotherapy for Breast Cancer
Radiotherapy directs energy at a planned area to lower local recurrence risk or relieve selected symptoms.
The key things to know
- The radiation oncologist individualises the field and schedule.
- External-beam radiotherapy does not make you radioactive.
When it is used
Radiotherapy is often recommended after breast-conserving surgery and may follow mastectomy depending on tumour features, lymph nodes and surgical margins. It can also relieve symptoms of metastatic disease. A radiation oncologist defines its purpose and treatment area with the wider team.
Planning and sessions
Planning scans establish position and help protect healthy tissues. Breath-hold techniques may be offered, particularly for some left-sided treatments. Schedules vary, so there is no single session count for everyone. External-beam treatment does not make you radioactive around other people.
Care during treatment
Skin may become sensitive, darker or red, and fatigue can build. Follow your unit's advice on washing, moisturisers and clothing. Report peeling skin or increasing pain. Avoid unapproved remedies, particularly on broken skin, so irritation or infection can be addressed early.
Follow-up and later effects
Later effects may include firmness, swelling or stiffness, with less common effects on the lung or heart depending on the field. Modern planning reduces but does not eliminate risks. New breathlessness or persistent pain deserves assessment, alongside ongoing shoulder and skin care.
Take these questions to your appointment
- Will a breath-hold technique help me?
- How should I care for my skin and when should I call?
Sources & review
This is original educational content based on the sources below, not reproduced textbook material. Website supervisor: Dr. Nizar Ismail. Individual medical review of this article is pending.
- Breast Cancer Now — Radiotherapy for primary breast cancer ↗
- NCI — Radiation Therapy to Treat Cancer ↗
This information cannot replace diagnosis or a personal treatment plan. Consult your care team about symptoms or decisions about your treatment.