The Mesothelium is a membrane in which protects most of the body’s internal organs. It produces a lubricating fluid that is released between its layers and facilitates the moving of organs. So for instance, the lungs expand and contract with each breath and their movement inside the chest cavity is lubricated by the protective coating provided by the Mesothelium.
The Mesothelium lining the lungs are called the Pleura (or Pleural Membranes). The space between the Pleural Membranes is referred to as the Pleural Space. When Mesothelioma is found in the Pleura, it is called Pleural Mesothelioma. This type of Mesothelioma is the most common and often also affects the heart because of its close proximity. Otherwise, it is unusual for Mesothelioma to spread to other parts of the body.
The Mesothelium lining the abdomen is called the Peritoneum. Like the Pleura, it produces a lubrication which allows the body’s internal organs to easily move in their space. Mesothelioma of the Peritoneum is called Peritoneal Mesothelioma.