<unk>  is a disease state in which there is inflammation of the pleura, the lining of the pleural cavity, surrounding the lungs.  A symptom associated with<unk>  or pleuritis is pleuritic chest pain.  Pleuritic chest pain is defined as a sharp pain on either inspiration or expiration.<unk>  can be caused by a variety of infectious and non-infectious causes.
Pleurisy
Hydrothorax
Trapped lung
Round pneumonia
Pleural effusion
Parapneumonic effusion
Chylothorax
Lung abscess