Mesothelioma is a a cancer affecting the mesothelial cells which cover most internal organs and is caused solely from exposure to asbestos. There are two main types of mesothelioma; pleural and peritoneal.
This is a type of cancer that starts in the membrane that covers the lungs. Although it develops in the chest and involves the lining of the lungs, it is not a lung cancer.
The other main type is peritoneal mesothelioma, accounting for about 10% of cases. It develops in the lining of the abdomen.