Mesothelium cancer or "Mesothelioma", is a disease in which the cells of the Mesothelium divide out of control and can invade and damage nearby tissues and organs. The disease usually begins in the pleura or peritoneum. Initially, Mesothelioma does not have many symptoms. When symptoms appear, they are usually the result of the cancer growing and pressing on a nerve or other body organ. Mesothelioma can also spread (metastasize) to other areas of the body.
Mesothelioma is still a rare cancer, but it is becoming more common. Annually about 2,000 new cases of Mesothelioma are diagnosed in the United States. The same is true of the United Kingdom. Probably due to exposure to asbestos at work, men are roughly 4 times more likely than women to be diagnosed with the disease--although it can appear in both sexes at any age. Pleural Mesothelioma is more frequent than Peritoneal Mesothelioma.