Mesothelioma is a rare form of cancer in which malignant (cancerous) cells are found in the mesothelium, a protective sac that covers most of the body's internal organs. Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles.

Asbestos is the name of a group of minerals that occur naturally as masses of flexible fibers that can be separated into thin threads and woven. Asbestos has been widely used industrial products mainly cement, brake linings, roof shingles, flooring products, textiles, and insulation. If tiny asbestos particles float in the air, especially during the manufacturing process, they may be inhaled or swallowed causing serious health problems.

Mesothelioma is a disease in which cells of the mesothelium become abnormal and invade and damage nearby tissues and organs. Cancer cells can also spread from their original site to other parts of the body.

Working with asbestos is the major risk factor for mesothelioma. A history of asbestos exposure at work is reported in about 75 percent of all cases. However, mesothelioma has been reported without any known exposure to asbestos. (Fit Commerce)