What is Mesothelioma

Mesothelioma is a type of cancer. It happens in the 'mesothelium' - a thin lining in your chest and your abdomen.

Mesothelioma in the chest

Your chest lining has two layers. The inner layer lines your lung, and the outer layer lines your chest wall. The space between the two layers contains a small amount of fluid. This lubricates the two surfaces and lets the lung and chest wall move and expand as you breathe. When a tumour grows within the chest lining, it causes it to thicken at first. Then it spreads within the space between the layers. The tumour often produces fluid, sometimes several litres.

Mesothelioma in the abdomen

Your abdominal cavity (the bit below your diaphragm) and bowel are also covered by a lining. Like your chest lining, it has two layers. The inner layer covers the organs in your abdomen (your stomach, etc), and the outer layer lines the wall of your abdomen. A tumour can start within this lining. It causes the lining around the organs in your abdomen to thicken. Lots of fluid can also be produced, which causes swelling of the abdomen.

Infomation sourced from the British Lung Foundation.