Mesothelioma is a form of cancer. The diseased mesothelioma patient will have cancer cells lining their body cavities including the area around the patient's heart and the chest (lungs.) Mesothelioma is almost always caused by exposure to asbestos.
This is a silicate mineral, chemically related to asbestos, common in the soil of the Anatoli region of Turkey. Many cases of mesothelioma have been described in this region and may have been caused by this mineral.