超敏性肺炎是一组肺的肉芽肿性疾病,由于吸入微细的抗原性物质所致。超敏性肺炎一词在北美较通用,而变态反应性肺泡炎则在英国较通用,它们指的是同一类疾病。引起超敏性肺炎的致病物多为有机物。超敏性肺炎是机体对一类特殊损伤的反应。超敏性肺炎与其他肺的肉芽肿病不一样,病变只局限于肺,而不侵及肺外组织,好发生于成年男性。有些类型的超敏性肺炎容易在某些季节发生,与特应性或HLA单型无关。与其他肺部疾患不一样,发病率不因吸烟而增高。超敏性肺炎可有急性、亚急性和慢性类 Hypersensitivity pneumonitis is a group of lung granulomatous disease caused by the inhalation of fine antigenic substances. The word hypersensitivity pneumonitis is more common in North America, and allergic alveolitis is more common in the United Kingdom, they refer to the same type of disease. Pathogens causing hypersensitivity pneumonitis are mostly organic. Hypersensitivity pneumonitis is the body’s response to a particular type of injury. Hypersensitivity pneumonitis and other lung granulomatosis is not the same, the lesion is confined to the lung, but not outside the lung tissue, occurs in adult men. Some types of hypersensitivity pneumonitis easily occur in certain seasons, regardless of atopic or HLA haplotype. Unlike other lung conditions, the incidence is not increased by smoking. Hypersensitivity pneumonitis may have acute, subacute and chronic categories