What is the role of radiation therapy in treating Melanoma

The Role of Radiation Therapy in Melanoma Treatment

Radiation therapy plays a targeted, supportive role in melanoma care rather than being a primary treatment. Let me explain how and when it's used.

How Radiation Therapy Works

Radiation therapy uses high-energy rays to kill cancer cells. According to the NCCN Guidelines for Patients: Melanoma (2025), radiation can be delivered in different ways depending on where the melanoma is located and what the treatment goal is.

When Radiation Is Used in Melanoma

Radiation therapy is typically considered in these situations:

1. For Regional (Stage 3) Melanoma

• When melanoma has spread to lymph nodes or nearby areas but hasn't spread to distant parts of the body
• Often used alongside surgery rather than instead of it
• May be combined with other treatments like immunotherapy

2. For Distant Metastatic Disease (Stage 4)

• When melanoma has spread to distant organs or the brain
• Particularly useful for brain metastases (cancer that has spread to the brain)

3. For Unresectable Disease

• When tumors cannot be safely removed by surgery
• Radiation becomes a more important treatment option

Types of Radiation Techniques

According to NCCN Guidelines, doctors may use specialized radiation approaches:

• Intensity-Modulated Radiation Therapy (IMRT): Uses multiple small beams of different strengths to target the tumor precisely while protecting surrounding healthy tissue

• Image-Guided Radiation Therapy (IGRT): Uses imaging before and during treatment to confirm the exact tumor location, improving accuracy

• Stereotactic Radiosurgery (SRS): Delivers a single high dose of radiation to small tumors with extreme precision—this is the preferred approach for brain metastases and is usually completed in just one session

• Stereotactic Radiotherapy (SRT): Similar to SRS but completed in 1-5 sessions, used for tumors in the body

Important Context: Surgery and Immunotherapy Are Primary

It's crucial to understand that surgery is typically the main treatment for early-stage melanoma. According to NCCN Guidelines, for stages 0-2 (early stage), surgery to remove the tumor is usually the first-line treatment. For more advanced stages, immunotherapy (drugs that help your immune system fight cancer) often becomes the primary systemic treatment.

Radiation therapy is usually added to these approaches rather than replacing them.

Potential Side Effects

According to NCCN Guidelines, radiation therapy may cause:

• Sunburn-like skin problems in the treated area
• Changes in skin color
• Hair loss around the treatment area
• Fatigue
• Nausea (if radiation targets the abdomen)

Questions to Ask Your Oncology Team

If radiation therapy is being considered for your situation:

1. Why is radiation recommended for my specific stage and location of melanoma?
2. Will radiation be combined with surgery, immunotherapy, or other treatments?
3. What type of radiation technique will be used, and why is that best for my situation?
4. What are the specific side effects I should expect, and how long will they last?
5. How many sessions will I need, and how far apart will they be?
6. Are there clinical trials combining radiation with newer immunotherapy approaches that might be appropriate for me?

The Bottom Line

Radiation therapy is a valuable tool in melanoma treatment, but it works best as part of a comprehensive plan that typically includes surgery and/or immunotherapy. Your oncologist will determine whether radiation is appropriate for your specific stage, location, and type of melanoma.

---

This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.

Sources: NCCN Guidelines for Patients: Melanoma (2025)