The most common form of mesothelioma comes with tumors found in the lungs. Approximately between 70 and 80% of mesothelioma patients have the cancer in their pleural, or lung, lining. A common misconception concerning mesothelioma is that the patient has to be exposed to asbestos in large quantities over many, many years. The truth is, mesothelioma can be contracted with very little exposure to asbestos.