[Allergic lung diseases].

Allergic lung diseases present with either lung diseases developed as a result of inhalation of allergens (bronchial asthma) and antigens (hypersensitivity pneumonitis) of as a manifestation of systemic diseases including sarcoidosis and collagen vascular diseases. A limited space is available, therefore only hypersensitivity pneumonitis. bronchial asthma, sarcoidosis. and eosinophilic pneumonia were briefly summarized although a list of the allergic lung diseases is extensive. As a video-assisted lung biopsy has presently been popular, thoracic surgeons should perform surgery with a correct understanding of the pathophysiology of the disease.