Why is it used after surgery?
After breast-conserving surgery, radiotherapy commonly lowers the risk of cancer returning in the breast. It may also be recommended after mastectomy or to treat nearby lymph-node regions in selected cases. The decision depends on tumour and patient characteristics.
How is treatment planned?
You usually lie with your arms supported during a planning CT scan. The team identifies the breast or chest wall, lymph-node areas when necessary, and nearby organs such as the heart and lungs. Deep-inspiration breath-hold may help reduce heart exposure for some patients.
How many sessions are needed?
Several schedules exist, including shorter courses for eligible patients. There is no single appropriate number for everyone.
Possible side effects
Skin sensitivity, colour changes, dryness or peeling, swelling and fatigue can occur. Some reactions peak after the last session; later effects are also possible.
Comfort and skin care
Wear comfortable clothing, avoid friction and follow your team’s washing and moisturising advice. Ask about exercise, physiotherapy and arm movement if you have had underarm surgery.
A common question
External beam breast radiotherapy does not make you radioactive, so normal contact with family and friends is safe.
Skin care and recovery
During breast or chest-wall radiotherapy, skin may become sensitive, dry, darker or red; fatigue is also possible. Use gentle washing, comfortable clothing and products approved by your care team. Modern techniques may reduce exposure to the heart or lung when needed, but every treatment has its own balance of benefits and risks.