The pleura is a double flexible casing surrounding the lungs with a sheet on the side of the lungs, and a sheet on the side of the chest. During inspiration, the thoracic cavity enlarges. Thanks to the pleura, which acts as an interface, the lung also s'expand.
The pleura may be cancerous. In 50 to 70% of cases the cause is exposure to asbestos, often occupational (insulation, textiles, construction, filters). Tobacco is not an issue. Asbestos is a product completely natural. It is a silicate of iron, magnesium and calcium (a mineral so) that forms the flexible fibers, rot and fire resistant. It is found in large quantities, especially since Canada is the world's largest producer.
The most common uses are thermal insulation and soundproofing for fibers "amphibole" and the manufacture of cement for fiber "chrysotile." Inhaled, amphibole fibers strongly promote cancer of the pleura. However, this risk is disputed by producer countries for chrysotile fiber cement. On this point, the opinion of European experts is in favor of a probable risk (difficult to quantify because the incidence of mesothelioma is comparatively unimportant).
For the record, exposure to asbestos fibers can cause three types of diseases: pulmonary fibrosis (asbestosis), leading to progressive respiratory failure, lung cancer (but we know that smoking is a risk factor even larger than l 'asbestos) and cancer of the pleura or "mesothelioma.
Exposure to asbestos can sometimes be very brief and very old (up to 40 years). The number of cases of cancer of the pleura increases by 25% every three years!
The pleura may be cancerous. In 50 to 70% of cases the cause is exposure to asbestos, often occupational (insulation, textiles, construction, filters). Tobacco is not an issue. Asbestos is a product completely natural. It is a silicate of iron, magnesium and calcium (a mineral so) that forms the flexible fibers, rot and fire resistant. It is found in large quantities, especially since Canada is the world's largest producer.
The most common uses are thermal insulation and soundproofing for fibers "amphibole" and the manufacture of cement for fiber "chrysotile." Inhaled, amphibole fibers strongly promote cancer of the pleura. However, this risk is disputed by producer countries for chrysotile fiber cement. On this point, the opinion of European experts is in favor of a probable risk (difficult to quantify because the incidence of mesothelioma is comparatively unimportant).
For the record, exposure to asbestos fibers can cause three types of diseases: pulmonary fibrosis (asbestosis), leading to progressive respiratory failure, lung cancer (but we know that smoking is a risk factor even larger than l 'asbestos) and cancer of the pleura or "mesothelioma.
Exposure to asbestos can sometimes be very brief and very old (up to 40 years). The number of cases of cancer of the pleura increases by 25% every three years!
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