What is mesothelioma?

Mesothelioma is a form of cancer is always caused by previous exposure to asbestos. And in this disease, malignant cells develop in the mesothelium, a protective layer that covers most of the organs. The most common site is the pleura (outer layer of the lungs and the chest wall) may also occur in the peritoneum (the lining of the abdominal cavity), heart, pericardium (a sac around the heart) or in tunica vaginalis