Malignant pleural mesothelioma -This type is a malignant cancer of the lungs, which is the most common type of the disease seen in patients suffering due to the inhalation of the asbestos fibers. This can be caused by working in such hazardous occupations as welding and fabrication plants, various types of construction, and many other industrial occuptions handling hazardous scrap materials. Pleural mesothelioma is most commonly apparent before other forms of the cancer, as the lungs are the first organ exposed to the asbestos. Malignant pleural mesothelioma is the most common as opposed to just pleural mesothelioma as the exposure rate of the lungs is higher than other organs, and cancerous growth is more eminent. Peritoneal mesothelioma is a type of cancer that affects mesothelium lining of the abdomen, and is due to exposure of asbestos dust. Most cases seen are in some way pleural affecting the lungs as the asbestos fibers must be inhaled through the airways in order to enter the body in the first place. That’s why you also may see cases in which the patient has both pleural and peritoneal mesothelioma. The mesothelium lining which lines the body’s internal organs is a protective tissue lining in which malignant cells develop in.