患者男,56岁。自1980年1月来,感乏力。4月初受凉后咳嗽,痰黄脓样,不易咳出,无发热、咯血或消瘦。4月17日 X 线胸片示右肺中叶外段4×3.5厘米阴影(图1,见插页3)。经青霉素、卡那霉素治疗,咳嗽减轻,痰呈白色,因 X 线阴影未消散,于4月22日收治入院。以往无慢性咳嗽史,1979年初 X 线胸片无异常。体检无特殊发现。化验检查:血、尿、粪常规均正常。痰培养3次为非致病菌生长,找癌细胞2次均阴性。X 线侧位体层片:右肺中叶阴影于4厘米和5 Male patient, 56 years old. Since January 1980, I feel weak. Early in April after a cold cough, sputum yellow pus-like, easy to cough, no fever, hemoptysis or weight loss. On April 17, the X-ray showed a 4x3.5 cm shadow of the middle right middle lobe (Figure 1, insert 3). After penicillin, kanamycin treatment, reduce cough, sputum was white, because the X-ray did not dissipate the shadow, admitted to hospital on April 22. In the past no history of chronic cough, no abnormal chest X-ray in early 1979. No special medical examination found. Laboratory tests: blood, urine, normal feces are normal. Sputum culture for non-pathogen growth 3 times, looking for cancer cells 2 were negative. X-ray tomosynthesis: the middle of the right lung shadow at 4 cm and 5