Every day this blog looks at issues dealing with mesothelioma, its about time, isn't it, that we looked at what Mesothelioma actually is.
Okay, first things first: Mesothelioma is cancer. The disease gets its name from the cells that this particular cancer attacks - the mesothelial cells. These cells form a lining that covers the outer surface of most of our internal body organs. This lining is sometimes referred to as the mesothelium.
The only cause of mesothelioma is exposure to asbestos dust, although there is a debate about whether a virus, SV40, can also cause the disease. We'll look at the arguments surrounding SV40 later on in this series of explanatory articles.
Logically, the cancer can occur anywhere in the mesothelium but the most common sites for it to occur are in the chest cavity, including the area around the heart, and in the abdomen.
The tissue that lines the chest cavity and covers the lungs is made from mesothelial cells. Yesterday, we learned that this lining is called the pleura, so it makes sense that cancer in this lining is called Pleural Mesothelioma.
Of course, the chest cavity contains more than just the lungs, it contains the heart too. The mesothelium that covers the heart is know as the pericardium, or the pericardial lining. This lining performs the same function for the heart as the pleura performs for the lungs - it allows the heart to move freely within the chest. So the pleura allows for free movement of the lungs as you breathe in and out and the pericardium allows for free movement of the heart as it expands and contracts with each beat.
Once one understands these basic facts, it becomes obvious how disastrous any damage to these tissues can be. Imagine the effects on your body when the movement of your lungs or your heart is impeded!
Remember that mesothelioma gets its name from the mesothelium, that is the lining that covers our internal organs. In the abdomen, this lining is known as the peritoneum. Thus, mesothelioma in the abdomen is known as Peritoneal Mesothelioma
So, we have:
Pleural Mesothelioma, which affects the lungs and, less frequently, the heart
Peritoneal Mesothelioma, which affects the organs in the abdomen
Logically, the cancer can occur anywhere in the mesothelium but the most common sites are in the chest cavity and in the abdomen
So far so good, but the medics go even further in defining the different types of mesothelioma, which we'll look at tomorrow.
All About Malignant Mesothelioma