<unk>  occurs in the<unk>  space, which is the thin fluid-filled area in between the two pulmonary<unk>  in the human body. There are several disorders and complications that can occur within the<unk>  area, and the surrounding tissues in the lung.
Pleural disease
Pleurisy
Pulmonary infiltrate
Lung tumor
Pleural effusion
Lung nodule
Pleural empyema
Lung abscess