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A.D.A.M. Medical Encyclopedia [Internet]. Atlanta (GA): A.D.A.M.; 2013.

A.D.A.M. Medical Encyclopedia.

Mesothelioma - malignant

Malignant mesothelioma

Last reviewed: May 29, 2014.

Malignant mesothelioma is an uncommon cancerous tumor of the lining of the lung and chest cavity (pleura) or lining of the abdomen (peritoneum). It is due to long-term asbestos exposure.

Causes

Long-term exposure to asbestos -- a fire-resistant material -- is the biggest risk factor. Asbestos was once commonly found in insulation, ceiling and roofing vinyls, cement, and automotive brake materials. Although many asbestos workers smoked, experts do not believe smoking itself is a cause of this condition.

Malignant mesothelioma affects men more often than women. The average age at diagnosis is 60. Most people seem to develop the condition about 30 years after being in contact with the asbestos.

Symptoms

Symptoms may not appear until 20 to 50 years or longer after exposure to asbestos, and may include:

Exams and Tests

The doctor or nurse will examine you and ask about your medical history and symptoms. Tests that may be done include:

Mesothelioma is often hard to diagnose under the microscope. It can be hard to distinguish between this disease and similar conditions and tumors.

Treatment

Malignant mesothelioma is a difficult cancer to treat.

There is usually no cure, unless the disease is found extremely early and the tumor can be completely removed with surgery. Most of the time when the disease is diagnosed it is too advanced for surgery. Chemotherapy or radiation may be used to reduce symptoms. Combining certain chemotherapy drugs may help decrease symptoms, but it will not cure the cancer.

Untreated, most patients survive about 9 months.

Consider participating in a clinical trial (test of new treatments), which may give you more treatment options.

Pain relief, oxygen, and other supportive treatments may also help relieve symptoms.

Support Groups

You can ease the stress of illness by joining a support group where members share common experiences and problems.

Outlook (Prognosis)

The average survival time varies from 4 to 18 months. Your outlook depends on:

  • The stage of the tumor
  • Your age and general health
  • Whether surgery is an option
  • Your response to treatment

Possible Complications

  • Side effects of chemotherapy or radiation
  • Continued spread of cancer to other organs

When to Contact a Medical Professional

Call for an appointment with your health care provider if you have symptoms of malignant mesothelioma.

Prevention

Avoid exposure to asbestos.

References

  1. National Cancer Institute: PDQ Malignant Mesothelioma Treatment. Bethesda, MD: National Cancer Institute. Date last modified 3/07/2014. Available at http://cancer.gov/cancertopics/pdq/treatment/malignantmesothelioma/HealthProfessional. Accessed May 29, 2014.
  2. National Comprehensive Cancer Network. NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines): Malignant pleural mesothelioma. Version 1.2014. Available at http://www.nccn.org/professionals/physician_gls/pdf/mpm.pdf. Accessed May 29, 2014.

Review Date: 5/29/2014.

Reviewed by: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only — they do not constitute endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only — they do not constitute endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

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