１病例资料女，３６岁。因气短、胸闷、轻咳伴白色泡沫样痰半年入院。无发热及呛咳。病人曾于多家医院就诊，经多次Ｘ线胸部透视、胸片检查均诊断为右肺感染，经抗炎治疗效果不佳。查体：发育良好，口唇无发绀，无杵状指，两侧胸廓对称，左胸叩诊过清音，听诊左肺呼吸音低... 1 case information Female, 36 years old. Due to shortness of breath, chest tightness, light cough with white foam sputum six months admitted. No fever and choking. The patient has been in many hospitals for treatment, after many chest X-ray, chest radiography were diagnosed as right lung infection, the anti-inflammatory treatment ineffective. Physical examination: well-developed, no cyanosis of the lips, no clubbing, both sides of the thorax symmetry, left chest percussion over the voiceless, auscultation left lung breath sounds low ...