Mesothelioma
Malignant mesothelioma is a rare cancer that occurs in the thin layer of tissue that covers the majority of your internal organs (mesothelium). Doctors divide mesothelioma into different categories based on what part of the mesothelium is affected by cancer. Mesothelioma that occurs in the tissue that surrounds the lung (pleura) is called pleural mesothelioma and is the most common form. Mesothelioma that occurs in the tissue in your abdomen (peritoneum) is called peritoneal mesothelioma and accounts for 10 percent to 20 percent of all mesotheliomas. In rare cases, mesothelioma can also occur in the lining around the heart (pericardium) and in the lining around the testicles (tunica vaginalis).
Between 2,000 and 3,000 people are diagnosed with mesothelioma in the United States each year. Men are more likely to develop mesothelioma than are women. It's more common in older adults — most people with mesothelioma are 65 and older — though mesothelioma can be diagnosed at any age.
Mesothelioma is closely linked to exposure to asbestos — a natural fiber that was once used in manufacturing a wide variety of industrial and household products. Mesothelioma rates have increased during the past 20 years in response to the widespread use of asbestos in the past. Many industrialized countries now limit asbestos use and enforce laws to protect workers who may be exposed. Researchers predict these efforts will lead to fewer cases of mesothelioma in the future.
Asbestosis
Asbestosis is a breathing disorder caused by inhaling asbestos fibers. Prolonged accumulation of these fibers in your lungs can lead to scarring of lung tissue and diminished breathing capacity. Signs and symptoms of asbestosis usually don't appear until years after exposure. But once apparent, the condition often worsens and can lead to disability and even death if exposure to asbestos continues.
Asbestos is a natural mineral product that's resistant to heat and corrosion. It was used extensively in the past in the building and manufacturing industries. Some of its more common uses were in pipe and duct insulation, fire-retardant materials, brake and clutch linings, cement, and some vinyl floor tiles.
People most likely to develop asbestosis are those who've been exposed to asbestos for a long time. Most people with asbestosis acquired it on the job before the federal government began regulating the use of asbestos and asbestos products in the mid-1970s. Today, its handling is strictly regulated. Still, experts estimate that since the 1940s up to 10 million people may have been exposed to asbestos. The good news is that most people with a history of prolonged exposure don't develop asbestosis, and the risk of asbestosis diminishes every day away from exposure.
These days, most instances of asbestos exposure occur during removal of old asbestos products or demolition of old buildings. If you live, work or study in a building where existing asbestos has been contained and sealed, you're not at risk of asbestosis.
Mesothelioma
Malignant mesothelioma is a rare cancer that occurs in the thin layer of tissue that covers the majority of your internal organs (mesothelium). Doctors divide mesothelioma into different categories based on what part of the mesothelium is affected by cancer. Mesothelioma that occurs in the tissue that surrounds the lung (pleura) is called pleural mesothelioma and is the most common form. Mesothelioma that occurs in the tissue in your abdomen (peritoneum) is called peritoneal mesothelioma and accounts for 10 percent to 20 percent of all mesotheliomas. In rare cases, mesothelioma can also occur in the lining around the heart (pericardium) and in the lining around the testicles (tunica vaginalis).Between 2,000 and 3,000 people are diagnosed with mesothelioma in the United States each year. Men are more likely to develop mesothelioma than are women. It's more common in older adults — most people with mesothelioma are 65 and older — though mesothelioma can be diagnosed at any age.Mesothelioma is closely linked to exposure to asbestos — a natural fiber that was once used in manufacturing a wide variety of industrial and household products. Mesothelioma rates have increased during the past 20 years in response to the widespread use of asbestos in the past. Many industrialized countries now limit asbestos use and enforce laws to protect workers who may be exposed. Researchers predict these efforts will lead to fewer cases of mesothelioma in the future.
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