1临床资料患者,男性,51岁。因“咳嗽、咯血1个月”入院。入院前1个月,患者无明显诱因出现咳嗽,咯白色粘痰,并咯血或痰中带血,晨起明显。无气紧、胸痛等症状。体格检查中,双肺呼吸音清晰,未闻及明显的干湿罗音。既往吸烟史30年,吸烟指数>400支/年。外院以“肺炎”治疗1周,症状无缓解。行胸部CT 1 clinical data, male, 51 years old. Because “cough, hemoptysis 1 month ” admission. One month before admission, the patient had no obvious incentive to cough, slightly sticky phlegm, and hemoptysis or bloody sputum, early morning obvious. No gas tight, chest pain and other symptoms. Physical examination, lung breath sounds clear, unheard of and obvious wet and dry rales. Past history of smoking 30 years, smoking index> 400 / year. Outside the hospital to “pneumonia” treatment for 1 week, no relief of symptoms. Chest CT