Radiation therapy

About this approach

Radiation therapy damages cancer-cell DNA using carefully planned radiation. It can treat a defined area, help reduce recurrence after surgery, or relieve symptoms such as pain. External-beam treatment, brachytherapy, and systemic radioactive medicines are different approaches with different uses. The choice depends on the cancer, its location, earlier treatment, and nearby healthy tissues. A radiation oncology consultation should explain both the treatment goal and the practical schedule.

Where it fits: Established cancer treatment

Where this treatment is used

Radiation is an established treatment for many cancers and may be used alone or with surgery and medicines. External-beam radiation and brachytherapy generally treat a specific area; some radioactive drugs travel through the body. Treatment planning accounts for tumor location and the sensitivity of surrounding structures. Cancer cells can continue to die after a course ends, so response assessment has its own timing. The expected benefit depends on the diagnosis and whether the aim is cure, recurrence reduction, disease control, or symptom relief. A more technically complex approach is not automatically the most useful option for every situation.

Procedure and practical considerations

Fatigue is common. Other effects depend strongly on the treated area and may include skin changes, swallowing difficulties, bowel symptoms, or urinary problems. Some effects improve after treatment, while others persist or appear months or years later. Report symptoms early so your team can assess their cause and help with nutrition, skin care, medicines, or other support.

Cancer guides that discuss this treatment

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Clinics reporting this approach

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