Malignant mesothelioma is a rare form of cancer in which malignant cells are formed in the thin layer of tissue that lines the chest cavity and covers the lungs called the pleura, or the thin layer of tissue that lines the abdomen and covers most of the organs in the abdomen known as the peritoneum.
Most people with malignant mesothelioma have worked or lived in places where they inhaled or swallowed asbestos. After being exposed to asbestos, it usually takes a long time for malignant mesothelioma to form. Living with a person who works near asbestos is also a risk factor for malignant mesothelioma.Malignant Mesothelioma Treatment (PDQ®)
Source: National Cancer Institute