Diagnosis

If you have signs and symptoms that might indicate mesothelioma, your doctor will conduct a physical exam to check for any lumps or other unusual signs.

Your doctor may order imaging scans, such as a chest X-ray and a computerized tomography (CT) scan of your chest or abdomen, to look for abnormalities.

Based on the findings, you may undergo further testing to determine whether mesothelioma or another disease is causing your symptoms.

Biopsy

Biopsy, a procedure to remove a small portion of tissue for laboratory examination, is the only way to determine whether you have mesothelioma. Depending on what area of your body is affected, your doctor selects the right biopsy procedure for you.

Options include:

  • Inserting a needle through the skin. The doctor might remove fluid or a piece of tissue with a thin needle inserted through the skin on your chest or abdomen.
  • Collecting a sample of tissue during surgery. A fluid or tissue sample might be collected during an operation. The surgeon might make a small incision and insert a tube with a video camera to see inside your chest or abdomen. Special tools can be passed through the tube to collect a tissue sample.

The tissue sample is analyzed under a microscope to see whether the abnormal tissue is mesothelioma and what types of cells are involved. The type of mesothelioma you have determines your treatment plan.

Determining the extent of the cancer

Once your mesothelioma is confirmed, your doctor may recommend additional tests to understand whether your cancer has spread to your lymph nodes or to other areas of your body.

Tests may include:

  • CT scans of the chest and abdomen
  • Magnetic resonance imaging (MRI)
  • Positron emission tomography (PET)

Your doctor determines which tests are appropriate for you. Not every person needs every test.

Your doctor uses the information from these tests to assign your cancer a stage. The stages of pleural mesothelioma are indicated using Roman numerals ranging from I to IV. A lower numeral means the cancer is more likely to be localized to the area around the lungs and the highest numeral means the cancer has spread to other areas of the body.

The cancer staging system continues to evolve and is becoming more complex as doctors improve cancer diagnosis and treatment. Your doctor uses your cancer stage to select the treatments that are right for you.

Formal stages aren't available for other types of mesothelioma.

Treatment

What treatment you undergo for mesothelioma depends on your health and certain aspects of your cancer, such as its stage and location.

Unfortunately, mesothelioma often is an aggressive disease and for most people a cure isn't possible. Mesothelioma is usually diagnosed at an advanced stage — when it isn't possible to remove the cancer through an operation. Instead, your doctor may work to control your cancer to make you more comfortable.

Discuss treatment goals with your doctor. Some people want to do everything they can to treat their cancer, even if that means enduring side effects for a small chance of an improvement. Others prefer treatments that make them comfortable so that they can live their remaining time as symptom-free as possible.

Surgery

Surgeons work to remove mesothelioma when it's diagnosed at an early stage. In some cases this may cure the cancer.

Most of the time, it isn't possible to remove all of the cancer. In this situation, surgery may help to reduce the signs and symptoms caused by mesothelioma spreading in your body.

Surgical options may include:

  • Surgery to decrease fluid buildup. Pleural mesothelioma may cause fluid to build up in your chest, causing difficulty breathing. Surgeons insert a tube or catheter into your chest to drain the fluid. Doctors may also inject medicine into your chest to prevent fluid from returning (pleurodesis).
  • Surgery to remove the tissue around the lungs. Surgeons may remove the tissue lining the ribs and the lungs (pleurectomy). This procedure won't cure mesothelioma, but may relieve signs and symptoms.
  • Surgery to remove a lung and the surrounding tissue. Removing the affected lung and the tissue that surrounds it may relieve signs and symptoms of pleural mesothelioma. If you'll be receiving radiation therapy to the chest after surgery, this procedure also allows doctors to use higher doses, since they won't need to worry about protecting your lung from damaging radiation.
  • Surgery for peritoneal mesothelioma. Peritoneal mesothelioma is sometimes treated with surgery to remove as much of the cancer as possible. Chemotherapy may be used before or after surgery.

Chemotherapy

Chemotherapy uses chemicals to kill cancer cells. Systemic chemotherapy travels throughout the body and may shrink or slow the growth of a mesothelioma that can't be removed using surgery. Chemotherapy may also be used before surgery (neoadjuvant chemotherapy) to make an operation easier or after surgery (adjuvant chemotherapy) to reduce the chance that cancer will return.

Chemotherapy drugs may also be heated and administered directly into the abdominal cavity (intraperitoneal chemotherapy), in the case of peritoneal mesothelioma.

Radiation therapy

Radiation therapy focuses high-energy beams from sources such as X-rays and protons to a specific spot or spots on your body. Radiation may be used after surgery to kill any remaining cancer cells. It may also help reduce signs and symptoms of advanced cancer in situations where surgery isn't an option.

Other treatments

In certain situations, other treatments might be used to treat mesothelioma. Other treatments include:

  • Immunotherapy. Immunotherapy uses your immune system to fight cancer. Your body's disease-fighting immune system may not attack your cancer because the cancer cells produce proteins that blind the immune system cells. Immunotherapy works by interfering with that process. This treatment might be an option if other treatments aren't working.
  • Targeted therapy. Targeted therapy uses drugs that attack specific vulnerabilities in cancer cells. These drugs aren't commonly used for treating mesothelioma, but your doctor might recommend targeted therapy based on the results of tumor DNA testing.

Clinical trials

Clinical trials are studies of new mesothelioma treatment methods. People with mesothelioma may opt for a clinical trial for a chance to try new types of treatment. However, a cure isn't guaranteed. Carefully consider your treatment options and talk to your doctor about what clinical trials are open to you. Your participation in a clinical trial may help doctors better understand how to treat mesothelioma in the future.

Clinical trials are currently investigating a number of new approaches to mesothelioma treatment, including new targeted therapy drugs and new approaches to immunotherapy.

Treatment for other types of mesothelioma

Pericardial mesothelioma and mesothelioma of tunica vaginalis are very rare. Early-stage cancer may be removed through surgery. Doctors have yet to determine the best way to treat later-stage cancers, though. Your doctor may recommend other treatments to improve your quality of life.

Alternative medicine

No alternative medicine treatments have proved helpful in treating mesothelioma. But complementary and alternative treatments may help control mesothelioma signs and symptoms. Discuss options with your doctor.

Mesothelioma can cause pressure within your chest that can make you feel as if you're always short of breath. Breathlessness can be distressing. Your doctor may recommend using supplemental oxygen or taking medications to make you more comfortable, but often these aren't enough. Combining your doctor's recommended treatments with complementary and alternative approaches may help you feel better.

Alternative treatments that have shown some promise in helping people cope with breathlessness include:

  • Acupuncture. Acupuncture uses thin needles inserted at precise points into your skin.
  • Breath training. A nurse or physical therapist can teach you breathing techniques to use when you feel breathless. Sometimes you may feel breathless and begin to panic. Using these techniques may help you feel more in control of your breathing.
  • Relaxation exercises. Slowly tensing and relaxing different muscle groups may help you feel more at ease and breathe easier. Your doctor may refer you to a therapist who can teach you relaxation exercises so that you can do them on your own.
  • Sitting near a fan. Directing a fan to your face may help ease the sensation of breathlessness.

Coping and support

A diagnosis of mesothelioma can be devastating not only to you but also to your family and friends. In order to regain a sense of control, try to:

  • Learn enough about mesothelioma to make decisions about your care. Write down questions to ask your doctor. Ask your health care team for information to help you better understand your disease. Good places to start looking for more information include the National Cancer Institute, the American Cancer Society and the Mesothelioma Applied Research Foundation.
  • Surround yourself with a support network. Close friends or family can help you with everyday tasks, such as getting you to appointments or treatment. If you have trouble asking for help, learn to be honest with yourself and accept help when you need it.
  • Seek out other people with cancer. Ask your health care team about cancer support groups in your community. Sometimes there are questions that can only be answered by other people with cancer. Support groups offer a chance to ask these questions and receive support from people who understand your situation. Online support message boards, such as the American Cancer Society's Cancer Survivors Network, can offer similar benefits while allowing you to remain anonymous.
  • Plan ahead. Ask your health care team about advance directives that give your family guidance on your medical wishes in case you can no longer speak for yourself.

Preparing for your appointment

If you have lung or abdominal symptoms, start by making an appointment with your family doctor. If your doctor suspects you may have mesothelioma, you may be referred to a doctor who specializes in lung diseases (pulmonologist) or abdominal problems (gastroenterologist).

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. Here's some information to help you get ready, and what to expect from your doctor.

What you can do

  • Be aware of any pre-appointment restrictions. At the time you make the appointment, be sure to ask if there's anything you need to do in advance, such as restrict your diet.
  • Write down any symptoms you're experiencing, including any that may seem unrelated to the reason for which you scheduled the appointment.
  • Write down key personal information, including any major stresses or recent life changes.
  • Make a list of all medications, vitamins or supplements that you're taking or that you've taken recently.
  • Consider taking a family member or friend along. Sometimes it can be difficult to remember all the information provided during an appointment. Someone who accompanies you may remember something that you missed or forgot.
  • Write down questions to ask your doctor.
  • Gather any medical records, such as past chest X-rays, that relate to your condition.

Your time with your doctor is limited, so preparing a list of questions can help you make the most of your time together. List your questions from most important to least important in case time runs out. For mesothelioma, some basic questions that you might consider asking your doctor include:

  • What is likely causing my symptoms or condition?
  • What are other possible causes for my symptoms or condition?
  • What kinds of tests do I need?
  • Can I see my X-rays or scans?
  • Is my condition likely temporary or chronic?
  • What is the best course of action?
  • What are the alternatives to the primary approach that you're suggesting?
  • I have these other health conditions. How can I best manage them together?
  • Are there any restrictions that I need to follow?
  • Should I see a specialist? What will that cost, and will my insurance cover it?
  • Are there brochures or other printed material that I can take with me? What websites do you recommend?
  • What will determine whether I should plan for a follow-up visit?

In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask other questions that occur to you.

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 to cover other points you want to address. Your doctor may ask:

  • When did you first begin experiencing symptoms?
  • Have your symptoms been continuous or occasional?
  • How severe are your symptoms?
  • What, if anything, seems to improve your symptoms?
  • What, if anything, appears to worsen your symptoms?
  • Does it hurt to take a deep breath?
  • Do your symptoms affect your ability to work?
  • Have you ever worked with asbestos?

What you can do in the meantime

Try to avoid anything that worsens your signs and symptoms. For instance, if you're experiencing shortness of breath, try to take it easy until you can meet with your doctor. If your breathlessness becomes distressing or uncomfortable, seek immediate medical attention.

By Mayo Clinic Staff