Introduction: Mesothelioma is a rare and aggressive form of cancer that primarily affects the mesothelial cells lining the lungs, chest cavity, abdomen, and heart. This deadly disease is primarily caused by exposure to asbestos, a naturally occurring mineral that was extensively used in construction, shipbuilding, and various industries throughout the 20th century. This article provides an overview of mesothelioma, including its causes, symptoms, diagnosis, and treatment options. Causes: The primary cause of mesothelioma is asbestos exposure. When asbestos fibers are inhaled or ingested, they can become lodged in the mesothelial lining of the lungs, abdomen, or other organs. Over time, these fibers can cause inflammation and scarring, eventually leading to the development of cancerous cells. Asbestos exposure can occur in various settings, including the workplace, home renovations, or even through secondary exposure from family members who worked with asbestos. Symptoms: Mesothelioma s...