患者男性 ,5 0岁。因咳嗽咯痰 1 0年 ,伴右下胸痛 1月 ,于 1 999年 1 1月 8日收住入院 ,无发热、盗汗、声嘶、消瘦、咯血、咳脓臭痰及铁锈色痰症状。吸烟 30余年 ,每天 2 0～ 30支。查体 :营养良好 ,咽部轻度充血 ,胸、腹部无异常体征。CT示 :左下肺胸膜下小结节影 0 .5 cm× 0 Male patient, 50 years old. Due to cough for 10 years, with right lower chest pain in January, admitted to hospital on January 8th, 1999, no fever, night sweats, hoarseness, weight loss, hemoptysis, cough pus and rust stains symptoms. Smoking for more than 30 years, 20 to 30 cigarettes per day. Physical examination: good nutrition, mild congestion in the throat, no abnormal signs of the chest and abdomen. CT showed: lower left lung subpleural nodules 0 .5 cm × 0