Updated on October 2, 2026.
Melanoma is a type of skin cancer that begins in the melanocytes, specialized cells found in the skin (and also eyes) that produce the pigment melanin. Metastatic melanoma is melanoma that has spread from its initial location in the skin to other areas of the body. It is also known as stage IV melanoma.
Common areas for metastatic melanoma to spread include other parts of the skin, subcutaneous tissue (a layer of tissue located below the skin), the lungs, liver, bones, and brain. Where the cancer has spread and how far the cancer has spread is a key determining factor for how the cancer can be treated.
Treatment options and treatment strategies have improved significantly in recent years, and roughly 50 percent of people with this type of cancer are achieving long-term remission.
A treatment plan will often include multiple therapies
Therapies like surgery and radiation can play a role in treatment, especially when spread is limited. More often, newer treatment options like immunotherapies and targeted drugs are used.
The treatment of metastatic melanoma often involves multiple therapies. This can mean a combination of different cancer drugs. It can mean combining different approaches to therapy, such as surgery to remove specific tumors followed by treatment with cancer drugs. It can mean switching to a different treatment when the cancer does not respond to the initial therapy. Metastatic melanoma is a different experience for everyone.
TIL therapy
Some treatments are a multi-step process. Tumor-infiltrating lymphocyte (TIL) therapy is a procedure that involves surgery, chemotherapy, and immunotherapy. This may be an option when metastatic melanoma does not respond to initial therapy.
This process involves collecting, multiplying, and infusing TILs, immune cells that have the ability to kill cancer cells. The steps in this process include:
- A surgical procedure is used to collect TILs from a tumor.
- Advanced technology is used to make an infusion containing billions of copies of the collected TILs. This takes several weeks.
- The person being treated will receive daily chemotherapy infusions for a week. This prepares the body and immune system for the TIL infusion.
- The person receives the infusion containing billions of TIL cells.
- For several days, the person receives multiple infusions of an immunotherapy called interleukin-2 (IL-2). This drug helps activate the infusion of TILs to attack the cancer.
TIL comes with a risk of significant side effects from chemotherapy, the TIL infusion, and IL-2. These include the risk of serious bleeding and infections, as well as problems with the heart, lungs, and kidneys. This highlights the importance of knowing how to discuss the risks and benefits of a treatment with a healthcare team.
What to ask when discussing a new therapy
Here are some questions to ask when discussing a new medication or procedure to treat metastatic melanoma.
Questions when starting a new medication
- What is the name of the medication and the dosage?
- Why is this medication recommended?
- How does the medication work?
- How is the medication administered?
- How often will this medication be administered?
- How long will I be taking this medication?
- What is the goal of this therapy? How will we know if it is working? How will I be monitored during this part of treatment?
- What are the potential side effects? Is there a risk of serious side effects?
- How will I feel while taking this medication?
- Are there things I will need to avoid while taking this medication, such as certain foods or activities?
- Am I at risk for infections? Do I need to take precautions to avoid infections?
- Can this medication interact with other medications or supplements? Always tell your healthcare provider about all medications you are taking, including medications for other conditions, over-the-counter medications, and supplements.
- What will this therapy cost? Who can I talk to if I have concerns about the cost of treatment?
Questions when discussing a localized therapy (like surgery or radiation)
- What is the name of the procedure?
- Why is this treatment recommended?
- What is removed during this procedure? Will I need reconstructive surgery?
- What is the goal of the procedure?
- What are the potential side effects or risks involved with this procedure?
- Do I need any tests or exams before this procedure?
- What healthcare provider will perform this procedure?
- Are there any alternatives to this approach to treatment?
- What will this procedure cost?
- What will the recovery process be like? How long will the recovery process take?
- Who can I talk to if I have concerns about the cost of treatment?
Remember, if you have questions about a diagnosis or treatment, need an explanation, or have concerns, your healthcare provider is your best source of information.
