Pleural Diseases
The pleura is a bag-like structure that covers both the lungs and the insides of the chest cavity. The space between these two layers of pleura is called the pleural space and it is normally filled with a small volume of fluid which enables the two layers to glide smoothly against each other without any friction during each breath. Pleural diseases occur when the covering layers are damaged by infection, injury or cancer and air/fluid/blood/pus accumulate between the layers.