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Subcutaneous emphysema can be caused by medical procedures and medical conditions that cause the pressure in the alveoli of the lung to be higher than that in the tissues outside of them. Its most common causes are pneumothorax and a chest tube that has become occluded by a blood clot or fibrinous material.
Familial emphysema: Introduction. Emphysema caused by genetic factors rather than smoking. Emphysema is lung damage which is mostly caused by smoking but in familial emphysema it is caused by the lack of the AAT enzyme which protects the elastin of the lung alveoli. ...more Â».mphysema is lung damage which is mostly caused by smoking but in familial emphysema it is caused by the lack of the AAT enzyme which protects the elastin of the lung alveoli. ... more Â».