闭塞性细支气管炎伴机化性肺炎 (BOOP)是一种以远端细支气管 ,肺泡管和肺泡腔内肉芽组织增生 ,并形成栓子为特征性病理改变的临床病理综合征。大部分病人的发病原因不清楚 ,故称特发性BOOP ,也叫隐原性机化性肺炎。BOOP虽然有其临床表现特点 ,但缺乏特异性 ,临床上容易被误诊为 Obstructive bronchiolitis with opportunistic pneumonitis (BOOP) is a clinicopathologic syndrome characterized by distal bronchioles, alveolar ducts and alveolar granulation tissue hyperplasia, and the formation of emboli as the characteristic pathological changes. Most patients the cause of the disease is not clear, so Idiopathic BOOP, also known as cryptogenic organic pneumonia. BOOP although its clinical features, but the lack of specificity, clinically easily misdiagnosed as