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    Malignant Mesothelioma Treatment (PDQ®): Treatment - Patient Information [NCI] - General Information About Malignant Mesothelioma

    Malignant mesothelioma is a disease in which malignant (cancer) cells form in the lining of the chest or abdomen.

    Malignant mesothelioma is a disease in which malignant (cancer) cells are found in the pleura (the thin layer of tissue that lines the chest cavity and covers the lungs) or the peritoneum (the thin layer of tissue that lines the abdomen and covers most of the organs in the abdomen). This summary is about malignant mesothelioma of the pleura.
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    Anatomy of the respiratory system, showing the trachea and both lungs and their lobes and airways. Lymph nodes and the diaphragm are also shown. Oxygen is inhaled into the lungs and passes through the thin membranes of the alveoli and into the bloodstream (see inset).

    Being exposed to asbestos can affect the risk of malignant mesothelioma.

    Anything that increases your chance of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn't mean that you will not get cancer. Talk to your doctor if you think you may be at risk.

    Many people with malignant mesothelioma have worked or lived in places where they inhaled or swallowed asbestos. After being exposed to asbestos, it usually takes a long time for malignant mesothelioma to form. Other risk factors for malignant mesothelioma include the following:

    • Living with a person who works near asbestos.
    • Being exposed to a certain virus.

    Possible signs of malignant mesothelioma include shortness of breath and pain under the rib cage.

    Sometimes the cancer causes fluid to collect around the lung or in the abdomen. These symptoms may be caused by the fluid or malignant mesothelioma. Other conditions may cause the same symptoms. Check with your doctor if you have any of the following problems:

    Tests that examine the inside of the chest and abdomen are used to detect (find) and diagnose malignant mesothelioma.

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