The short answer
Mesothelioma is a rare cancer that starts in the thin lining around the lungs, abdomen, or heart. It is strongly linked to past asbestos exposure and often appears decades later. Symptoms can include trouble breathing, cough, or belly pain and swelling, and treatment may include surgery, chemotherapy, radiation, and newer options.
Mesothelioma is a rare cancer of the body's internal linings.
It is strongly linked to past asbestos exposure.
It often develops decades after exposure.
Symptoms can include trouble breathing, cough, chest pain, or belly pain and swelling.
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The whole article, with every detail and caution.
This page is for anyone who wants to understand mesothelioma. It covers the link with asbestos. It also covers symptoms, diagnosis, and treatment.
What mesothelioma is
MedlinePlus calls mesothelioma rare but serious. It starts in the mesothelium. This is the thin tissue that lines the lungs, the abdomen, and the heart. When it affects the lining around the lungs, doctors call it pleural mesothelioma.
The link with asbestos
NCI names asbestos exposure as the major risk factor. MedlinePlus says most people who get mesothelioma worked or lived where they breathed in or swallowed asbestos. Asbestos is a mineral. It was once widely used in construction and industry. NCI lists these jobs with exposure: shipbuilding, asbestos mining, textile manufacturing, construction, insulation work, demolition, drywall removal, firefighting, and auto repair. Family members of exposed workers may face risk too. Fibers can be carried home on shoes, clothing, skin, and hair.
NCI says symptoms of an asbestos-related condition can take 10 to 40 years or more to appear. So the disease can surface in people who worked with asbestos long ago.
Symptoms
According to MedlinePlus, pleural mesothelioma can cause trouble breathing, cough, and rib cage pain. Mesothelioma in the abdominal lining is called peritoneal mesothelioma. MedlinePlus lists belly pain, swelling and lumps, weight loss, constipation, and tiredness. Many other conditions cause these symptoms. Still, tell your doctor soon about new or worsening breathing trouble or belly symptoms. Severe trouble breathing or chest pain needs emergency care: call 911.
Diagnosis
MedlinePlus says providers use a physical exam, imaging tests, and a biopsy. A biopsy means removing a small piece of tissue. It is then examined under a microscope. NCI describes staging from I to IV. The stage helps guide treatment.
Treatment
Treatment depends on the type, the stage, and your overall health. For early-stage mesothelioma, NCI describes surgery as an option. One approach removes the lung, the chest lining, the diaphragm, and the lining of the heart sac. Doctors call it extrapleural pneumonectomy. Another approach is pleurectomy with decortication. It removes the lining of the lung and chest.
For more advanced disease, NCI lists chemotherapy and immunotherapy. Nivolumab and ipilimumab are approved immunotherapy drugs. Bevacizumab is a targeted therapy. It may be combined with chemotherapy. Some treatments ease symptoms. One drains fluid from around the lung. Another is pleurodesis. It uses chemicals to scar the space, so fluid is less likely to build up.
For peritoneal mesothelioma, NCI describes hyperthermic intraperitoneal chemotherapy (HIPEC). It delivers heated drugs directly into the abdomen.
NCI encourages patients to ask about clinical trials.
If you were exposed to asbestos
NCI says most people exposed to asbestos do not become ill from it. If you know you had asbestos exposure, tell your doctor. This matters most if you develop new breathing or belly symptoms.
What to ask your team
- Is my asbestos exposure history relevant to my diagnosis?
- What type and stage of mesothelioma do I have?
- Is it in the chest or the abdomen?
- What treatment options, including clinical trials, are open to me?
- Would care at a specialist center be an option in my case?
Sources
Common questions
What causes mesothelioma?
It is strongly linked to past asbestos exposure and often develops decades later. Most people exposed to asbestos never develop it, though.
Where does mesothelioma start?
In the thin lining around the lungs, the abdomen, or the heart.
What are the symptoms?
MedlinePlus lists trouble breathing, cough and rib cage pain for the lung form. For the abdominal form it lists belly pain, swelling and lumps, weight loss, constipation and tiredness.
How is it treated?
Depending on type and stage, treatment can include surgery, chemotherapy, radiation, and immunotherapy.
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Sources last checked: 2026-10-02 what this meansLast updated: 2026-10-02Next planned review: 2027-07-12
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Editorial review complete — This page completed Cancer Explained's editorial checks (sources, safety, plain language, duplication). It has not been reviewed by a physician or other healthcare professional.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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