Mesothelioma is a rare and aggressive form of cancer that affects the lining of the lungs (pleura), abdomen (peritoneum), or heart (pericardium). It is almost exclusively caused by asbestos exposure. Symptoms of mesothelioma can take 20-50 years to appear after initial exposure, making early diagnosis difficult. Common symptoms include chest pain, shortness of breath, and abdominal swelling.
