1病例资料患者男,84岁,因“间断咳嗽、气短20余年,加重2个月,咯血伴发热2 d”于2015-01-09入院。患者20年前无明显诱因出现咳嗽,伴气短,自觉症状可耐受,二十余年来未予以特殊诊治。2个月前患者着凉后于夜间睡眠时突感气短加重,伴有咳嗽及胸闷不适,无法平卧,遂就诊于当地医院,入院后行胸部CT检查(见图1),予以甲基泼尼松龙 1 case data Male, 84 years old, because of “intermittent cough, shortness of breath more than 20 years, aggravating 2 months, hemoptysis with fever 2 d ” in 2015-01-09 admission. 20 years ago, no obvious incentive to patients with cough, shortness of breath, subjective symptoms can be tolerated, more than 20 years has not been a special diagnosis and treatment. 2 months ago, the patient had sudden onset of shortness of breath and increased shortness of breath during sleep at night, accompanied by cough and chest tightness, unable to lie down. Then he was referred to a local hospital and underwent chest CT examination after admission (see Figure 1) Pine