The mission of All About Malignant Mesothelioma is to provide a one-stop resource for comprehensive, up-to-date information on the full scope of mesothelioma issues, from diagnosis to treatment to legal rights. Mesothelioma is a rare form of cancer that affects the mesothelial cells of the serous membranes in the body. Two to three thousand new cases of malignant mesothelioma are diagnosed each year.