Chemotherapy uses anticancer medicines to kill cancer cells. The medicines are made to attack and kill cancer cells that grow quickly. Some normal cells also grow quickly. Because of this, chemotherapy can also harm those cells. This can cause side effects.
Chemotherapy is sometimes used to treat advanced melanomas. But it is not used as often as it was in the past because newer types of medicines seem to be more helpful. Examples are immunotherapy and targeted therapy. Chemotherapy is most often used to treat advanced melanomas if other treatments are no longer working.
Chemotherapy medicine is most often given through an IV. It may also be taken by mouth as a pill, or as an injection. The treatment may be done as an outpatient visit to a hospital, and you go home the same day. Or it may be at your doctor’s office, a chemotherapy clinic, or at home. In some cases, you may stay in the hospital during treatment.
You get chemotherapy in cycles over a period of time. That means you may take the medicine for a set amount of time and then you have a rest period. Each period of treatment and rest is one cycle. You may have several cycles. Having treatment in cycles helps by:
Killing more cancer cells. The medicine can kill more cancer cells over time, because cells aren't all dividing at the same time. Cycles allow the medicine to fight more cells.
Giving your body a rest. Treatment is hard on other cells of the body that divide quickly. This includes cells in the lining of the mouth and stomach. This causes side effects, such as sores and nausea. Between cycles, your body can get a rest from the chemotherapy.
Giving your mind a rest. Having chemotherapy can be stressful. Taking breaks between cycles can let you get an emotional break between treatments.
The chemotherapy medicines most often used for melanoma include:
For melanoma, you may get just one medicine or more than one medicine. This is called combination therapy. The schedule of treatment varies for each person. Which medicines you take and how often you take them depend on many factors, such as your general health.
If you are having chemotherapy, you may have it along with immunotherapy medicine. This is sometimes called biochemotherapy.
Side effects of chemotherapy depend on the type and amount of medicines you’re taking. They vary from person to person. Some common temporary side effects from chemotherapy include:
Loss of appetite, nausea, and vomiting
Infections from low white blood cell counts
Easy bruising or bleeding from low blood platelet counts
Fatigue from low red blood cell counts
Numbness or tingling in the hands or feet (peripheral neuropathy)
Constipation or diarrhea
Most of side effects will go away or get better between treatments and a few weeks after treatment ends. You may also be able to help control some of these side effects. Tell your healthcare providers about any side effects you have. They can help you cope with the side effects.
A more serious possible side effect of some chemotherapy medicines is organ damage. This can include damage to the kidneys, liver, testicles, ovaries, brain, heart, or lungs. You may have blood tests while you’re getting chemotherapy. This is to make sure you aren’t having harmful reactions to the medicine.
If the melanoma is on a leg or arm, you may also get the medicine by isolated limb perfusion (ILP). This procedure may shrink the tumor and help prevent amputation. It may also relieve symptoms, such as pain and swelling.
ILP combines surgery and medicine. First the surgeon temporarily stops the blood circulation to the affected arm or leg. Keeping the blood supply in the limb stops high doses of chemotherapy medicine from traveling around the body and affecting other organs.
Then 2 small tubes called catheters are put into the limb. One is put in an artery and one is put in a vein. Blood from the vein goes into a machine called a pump-oxygenator. This machine is like the one used in heart bypass surgery. There the blood is mixed with oxygen and chemotherapy medicine. Melphalan is the most common medicine used for this. The blood is then sent to the limb through the artery.
Chemotherapy medicine moves through the limb for up to 90 minutes. During this time, blankets keep the limb warm. The medicines are also warmed as they move through the pump-oxygenator. This may help the chemotherapy work better. At the end of the procedure, the medicines are flushed out of the limb. Normal circulation is resumed. The entire procedure takes about 2 to 3 hours.
The main advantage of ILP is that it lets high doses of chemotherapy medicine be given to the affected limb. But it spares the rest of the body from the medicine’s side effects. Side effects are mostly limited to the limb, such as limb swelling.
But ILP also has a few drawbacks. For one, it is major surgery. Also it does not affect any cancer that has spread beyond the limb. And while this procedure can often shrink tumors, it may not improve long-term survival better than other treatments.
It's important to know which medicines you're taking. Write your medicines down, and ask your healthcare team how they work and what side effects they might have.
Talk with your healthcare providers about what signs to look for and when to call them. For example, chemotherapy can make you more likely to get infections. Make sure you know what number to call with questions. Is there a different number for evenings and weekends?
It may be helpful to keep a diary of your side effects. Write down physical, thinking, and emotional changes. A written list will make it easier for you to remember your questions when you go to your appointments. It will also make it easier for you to work with your healthcare team to make a plan to manage your side effects.
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