What type of cancer is mesothelioma?

Mesothelioma is primarily known as a cancer that develops in the mesothelial cells, which are the thin layers of tissue that line various body cavities. The most common form of mesothelioma occurs in the pleura, the lining of the lungs, but it can also affect the peritoneum, which lines the abdominal cavity, and in rare cases, the pericardium, which encases the heart.

The correct answer identifies that mesothelioma is associated with the cancer of the lung or stomach lining, which refers to the pleura and peritoneum. This connection is particularly significant due to the link between exposure to asbestos and the development of mesothelioma, highlighting why awareness and monitoring for asbestos in environments are crucial for health. Understanding the specific locations affected by this cancer helps in recognizing the disease's association with harmful exposures, guiding both prevention efforts and medical responses.