"Pleural Mesothelioma is a disease that affects the lining of the lungs, or lung pleura. Contrary to popular belief, mesothelioma is not a type of primary lung cancer. Instead, it is cancer of the serious membranes, which enclose numerous organs throughout the midsection (which includes the lungs). Other types of mesothelioma; peritoneal and pericardial can affect the membranes of the abdomen (peritoneal) and the membranes of the heart (pericardial).
Pleural Mesothelioma is a cancer that exclusively infects the membranes of the lungs. While it usually affects both of the lungs simultaneously, there is a slighly higher incidence of mesothelioma in the right lung because the left lung is smaller. Since the right lung is larger, it offers a greater amount of surface area to become infected. As the disease develops, the tumor (mass) that develops grows larger and more lethal. With each passing minute, the malignant tumor spreads and threatens to compromise the lungs. Not only does the malignant tumor spread at an incredible rate, but in most cases of pleural mesothelioma, multiple tumor masses develop. As more and more masses form, the cancerous cells begin to infect other tissue outside of the lung pleura. This can be disasterous unless treated in its earlier stages. Pleural Mesothelioma is a very lethal type of mesothelioma, which represents about 75 percent of all mesothelioma cases.