Filed under: Cancer & Chemo
Mouth cancer refers to cancer that develops in any of the parts that make up the mouth. Mouth cancer can occur on the lips, gums, tongue, inside lining of the cheeks, and the roof and floor of the mouth.
Cancer that occurs on the inside of the mouth is sometimes called oral cancer or oral cavity cancer.
Mouth cancer is one of several types of cancer grouped in a category called head and neck cancers. Mouth cancer and other head and neck cancers are often treated similarly.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Signs and symptoms of mouth cancer may include:
When to see a doctor
Make an appointment with your doctor or dentist if you have any persistent signs and symptoms that bother you and last more than two weeks. Your doctor will likely investigate other more common causes for your signs and symptoms first, such as an infection.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Mouth cancer occurs when cells on your lips or in your mouth develop changes (mutations) in their DNA. These mutations allow cancer cells to grow and divide when healthy cells would die. The accumulating mouth cancer cells can form a tumor. With time they may spread to other areas of the mouth and on to other areas of the head and neck or other parts of the body.
Mouth cancers most commonly begin in the flat, thin cells (squamous cells) that line your lips and the inside of your mouth. Most oral cancers are squamous cell carcinomas.
It's not clear what causes the mutations in squamous cells that lead to mouth cancer. But doctors have identified factors that may increase the risk of mouth cancer.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Factors that can increase your risk of mouth cancer include:
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Mouth cancer treatment can cause complications that make it difficult to speak, swallow or chew. Your doctor may anticipate some of these complications and may refer you to specialists who can prepare you for changes and help you recover after your treatment.
Depending on your situation, you may be referred to specialists who can help you with:
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
If you suspect that you have mouth cancer, you're likely to start by first seeing your family doctor or a general practitioner. However, in some cases when you call to set up an appointment, you may be referred immediately to a dentist or a dentist who specializes in diseases of the gums and related tissue in the mouth (periodontist).
Because appointments can be brief, and because there's often a lot of ground to cover, it's a good idea to be well prepared for your appointment. Here's some information to help you get ready for your appointment, and what to expect from your doctor.
What you can do
Your time with your doctor is limited, so preparing a list of questions will help you make the most of your time together. List your questions from most important to least important in case time runs out. For mouth cancer, some basic questions to ask your doctor include:
In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask questions during your appointment at any time that you don't understand something.
What to expect from your doctor
Your doctor is likely to ask you a number of questions. Being ready to answer them may allow more time later to cover other points you want to address. Your doctor may ask:
What you can do in the meantime
Avoid doing things that worsen your signs and symptoms. If you have pain in your mouth, avoid spicy foods or hard foods that may cause further irritation. If you're having trouble eating because of pain, consider drinking nutritional supplement beverages. These can give you the nutrition you need until you can meet with your doctor or dentist.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Tests and procedures used to diagnose mouth cancer include:
Mouth cancer stages
Once mouth cancer is diagnosed, your doctor works to determine the extent, or stage, of your cancer. Mouth cancer staging tests may include:
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Treatment for mouth cancer depends on your cancer's location and stage, as well as your overall health and personal preferences. You may have just one type of treatment, or you may undergo a combination of cancer treatments. Discuss your options with your doctor.
Surgery
Surgery for mouth cancer may include:
Surgery carries a risk of bleeding and infection. Surgery for mouth cancer often affects your appearance, as well as your ability to speak, eat and swallow. Your doctor may refer you to specialists who can help you cope with these changes.
Radiation therapy
Radiation therapy uses high-energy beams, such as X-rays, to kill cancer cells. Radiation therapy can be delivered from a machine outside of your body (external beam radiation) or from radioactive seeds and wires placed near your cancer (brachytherapy). Mouth cancers are particularly sensitive to radiation therapy.
Radiation therapy may be the only treatment you receive if you have an early-stage mouth cancer. Radiation therapy can also be used before or after surgery. In other cases, radiation therapy may be combined with chemotherapy. This combination increases the effectiveness of radiation therapy, but it also increases the side effects you may experience. In cases of advanced mouth cancer, radiation therapy may help relieve signs and symptoms caused by the cancer, such as pain.
Side effects of radiation therapy to your mouth may include dry mouth, tooth decay, mouth sores, bleeding gums, jaw stiffness, fatigue and red, burn-like skin reactions.
Chemotherapy
Chemotherapy is a treatment that uses chemicals to kill cancer cells. Chemotherapy drugs can be given alone, in combination with other chemotherapy drugs or in combination with other cancer treatments. Chemotherapy may increase the effectiveness of radiation therapy, so the two are often combined.
Side effects of chemotherapy depend on which drugs you receive. Common side effects include nausea, vomiting and hair loss.
Targeted drug therapy
Targeted drugs treat mouth cancer by altering specific aspects of cancer cells that fuel their growth. Cetuximab (Erbitux) is one targeted therapy approved for treating head and neck cancers in certain situations. Cetuximab stops the action of a protein that's found in many types of healthy cells, but is more prevalent in certain types of cancer cells.
Other targeted drugs are being studied in clinical trials. Targeted drugs can be used in combination with chemotherapy or radiation therapy.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
Quit using tobacco
Mouth cancers are closely linked to tobacco use, including cigarettes, cigars, pipes, chewing tobacco and snuff, among others. Not everyone who is diagnosed with mouth cancer uses tobacco. But if you do, now is the time to stop because:
Quitting smoking or chewing can be very difficult. And it's that much harder when you're trying to cope with a stressful situation, such as a cancer diagnosis. Your doctor can discuss all of your options, including medications, nicotine replacement products and counseling.
Quit drinking alcohol
Alcohol, particularly when combined with tobacco use, greatly increases the risk of mouth cancer. If you drink alcohol, stop now. This may help reduce your risk of a second cancer. Stopping drinking may also help you better tolerate your mouth cancer treatments.
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
No alternative treatments have proved helpful in treating mouth cancer. However, some complementary and alternative treatments may help you cope with your diagnosis and with the side effects of mouth cancer treatment. Talk to your doctor about your options.
Alternative treatments you may find helpful include:
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As you discuss your mouth cancer treatment options with your doctor, you may feel overwhelmed. It can be a confusing time, as you're trying to come to terms with your new diagnosis, but also being pressed to make treatment decisions. Cope with the uncertainty of this time by taking control of what you can. For instance, try to:
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.
There's no proven way to prevent mouth cancer. However, you can reduce your risk of mouth cancer if you:
©1998-2009 Mayo Foundation for Medical Education and Research (MFMER). Terms of use.


