1) Mesothelioma is a rare disease caused as a result of malignant cancerous cells lining the patient's body cavities such as chest, abdominal region or the area surrounding the heart. It is typically associated with exposure to asbestos which has been documented in as many as 70-80% of all mesothelioma cases. This disease is very difficult to assess consistently due to the great variability in time before diagnosis and the rate of progression of malignant mesothelioma.
2) A rare cancer known that affects thin membranes surrounding lungs and other internal organs. Mesothelioma has been associated with asbestos exposure.