<unk>  can be classified into tension and non-tension<unk> . A tension<unk>  is an acute medical emergency as air accumulates rapidly in the pleural space with each breath. The increase in intrathoracic pressure results in massive shifting of the mediastinum away from the affected lung compressing intrathoracic vessels. Non-tension<unk>  is of lesser severity because there is slower accumulation of air and therefore slower increase in air  pressure in the pleural cavity. In primary spontaneous<unk> , it is usually characterized by a rupture of a bleb in the lung while secondary spontaneous<unk>  mostly occurs due to chronic obstructive pulmonary disease (COPD). There are several diseases that may lead to secondary spontaneous<unk>  including tuberculosis, pneumonia, asthma, cystic fibrosis, lung cancer, interstitial lung disease, and marfan's syndrome.
Pneumothorax classification
Hemothorax classification
Pleural effusion classification
Pneumomediastinum classification
Pulmonary embolism classification
Pleural empyema classification
Aspiration pneumonia classification
Hemoptysis classification