Pleural effusion
The lungs are covered by a membrane: the pleura. Normally, a small amount of fluid flows in the pleural space to prevent friction during breathing. Certain diseases (infections, inflammations, tumors, trauma…) can lead to excess fluid formation in the pleural space (pleural effusion). When the membrane itself becomes swollen and inflamed, the condition is known as pleurisy. These conditions can make breathing difficult or painful.
In order to prevent fluid re-accumulation and your disease from recurring, your doctor will start by identifying the disease causing the pleural effusion. A fluid sample can be obtained for proper diagnosis, a procedure called thoracocenthesis. The excess fluid can also be drained to allow the lung to re-expand.