Mesothelioma is a type of cancer that begins to grow in the pleural membrane. Your chest contains two thin layers of cells – an outer layer that lines the inside of your rib cage and an inner layer that covers your lungs. These layers are called the pleura or pleural membrane. Each layer is about as thin as the skin of a balloon.
The space between the two layers is called the pleural space and it normally contains a small amount of fluid. This fluid lubricates the two surfaces and lets your lungs and chest wall move and expand as you breathe in and out.
Asbestos exposure is the main cause of pleural mesothelioma. When asbestos fibers are breathed in, they travel to the ends of small air passages and reach the pleura, where they can cause inflammation and scarring.
For more information, go to : https://mesothelioma.net