Pleural mesothelioma is a type of cancer that grows in the outer lining of the lungs and is associated with exposure to asbestos earlier in life. This exposure could come from old buildings, factories, and from mining asbestos.
Asbestos particles effect more than just those that mine or work with it. It also can come home with them and be inhaled by family members and even people at a business close to a mine or factory. Pleural mesothelioma is categorized in four distinct stages.
The most common system to determine the stage mesothelioma is in is called the International Mesothelioma Interest Group (IMIG) system and is based on the TNM system used in other types of cancer.
Stage one is when the cancer is beginning to affect the outer layers of the lung or chest wall on one side and may be on the diaphragm. This only applies when the mesothelioma is on one side of the chest.
Stage two is when the mesothelioma is in both the inner and outer layers of the lung and a tumor has started to grow.
In stage three it may have spread to the chest wall or possibly the pericardium or the sac that covers the heart and its main arteries and blood vessels....
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