Mesothelioma - Cancer of the Lung Lining
Mesothelioma is a very rare
form of lung cancer that arises in the mesothelium. The mesothelium is made up
of parietal and visceral membranes, thin layers of tissue, which surround
organs and body cavities, such as the lungs or abdomen. The visceral membrane
immediately surrounds the organ, and the parietal membrane is a sac covering
the visceral membrane. The visceral and parietal membranes make up the
mesothelium.
This fluid helps organs move easily among surrounding structures. In the case
of the lung, it helps reduce friction between the lung and chest wall during
normal breathing as the lung expands.
The mesothelium is
referred to by different names, depending on what part of the body it is found
in. In the abdomen, it is called the peritoneum; in the lungs, the pleura, and
in the heart, the pericardium. These correspond to peritoneal
mesothelioma (cancer of the abdomen/stomach), pleural
mesothelioma (cancer of the lung lining) and pericardial
mesothelioma.
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