Mesothelioma From Asbestos Mesothelioma occurs when the linings that surround organs in the body, like stomach, lungs heart and reproductive organs, grow out of control. The majority of cases are linked to asbestos, a grouping of minerals that have microscopic fibers that are resistant to chemicals and heat. After exposure, symptoms may take years to show. It is often difficult to diagnose because the early symptoms are similar to those seen in other diseases. ...