Mesothelioma cancers are variations of cancers that typically find their origination in the mesothelium. The mesothelium is a thin layer that spans over the lungs. That layer is often referred to as lining, can also be found in number of other organs, including the heart. For instance, the lining that surrounds the organs located in the abdomen is called peritoneal membrane.

The lining around the lungs is named pleura and the one that embeds the heart is called pericardium. All the linings fun...