Overview of mesothelioma cancers Mesothelioma cancers are the cancers that spread in the mesothelium tissues. Mesothelium in general is the name of tissue that forms lining of different body organs such as heart, lungs, abdomen and reproductive organs. The lining around abdominal organs is known as peritoneal membrane. Lining around lungs is called pleural membrane while the lining around heart is called pericardium.
