Types of Mesothelioma

The key to understanding mesothelioma is understanding the various locations that the mesothelium is found and the role that it plays. The lungs are surrounded by a portion of the mesothelium, and the chest cavity wall opposite the lungs is also covered by the mesothelium. These two layers of tissue comprise the pleura, or pleural mesothelium. Another portion of the mesothelium wraps around the heart; this tissue is known as the pericardium. The third important portion of the mesothelium covers the abdominal cavity wall; this portion of the protective tissue is called the peritoneum, or peritoneal mesothelium. The three main malignant types of mesothelioma are:

Pleural Mesothelioma develops in the lining of the lungs. It accounts for about seventy percent of all malignant mesothelioma cases. Because asbestos fibers that affect humans are most commonly inhaled the diseases they cause are most often in or around the lungs.



Peritoneal Mesothelioma develops in the abdominal cavity and often attacks the liver, kidneys and other organs. About fifteen to twenty percent of all mesothelioma cases develop in the peritoneum.

Pericardial Mesothelioma impacts the sac around the heart, is exceedingly rare – occurring in about five percent of all cases. Pericardial mesothelioma can have a fatal impact on cardiovascular function because of the pressure the swollen pericardium applies on the heart.

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