1病例介绍患者男,51岁。因“进行性消瘦16个月,咳嗽、咳痰3个月”入院。患者16个月来无明显诱因出现体重下降28 kg,咳嗽,咳白痰。无胸痛、痰中带血及咯血;无低热、盗汗、乏力及厌食。体征:皮肤黏膜无紫绀,双肺呼吸音粗,未闻及干湿性罗音,心脏(-),双侧腹股沟淋巴结肿大。杵状指(趾)(-),神经系统(-)。既往慢性胃炎、支气管哮喘病史。两 1 case description Patient male, 51 years old. Because of “progressive weight loss 16 months, cough, expectoration for 3 months ” admission. Patients 16 months no obvious incentive to weight loss 28 kg, cough, cough and white sputum. No chest pain, bloody sputum and hemoptysis; no fever, night sweats, fatigue and anorexia. Signs: skin and mucosa without cyanosis, lung breath sounds crude, unheard and wet and dry rales, heart (-), bilateral inguinal lymph nodes. Clubbing finger (toe) (-), nervous system (-). Past chronic gastritis, bronchial asthma history. Two