【例１】　男，６５岁。有反复咳嗽、咳痰史２０年。于１９９５年９月中旬受凉后咳嗽，咳出极粘稠、略成固体树枝样条状物，偶带有血丝，在外院３次查痰抗酸杆菌均阴性，抗结核治疗半个月无效，咳出物疑为肿瘤坏死组织，以“肺癌待除外”于１１月２２日转入我院。查体有肺气肿 [Example 1] Male, 65 years old. Have repeated cough, sputum history of 20 years. In mid-September 1995 after a cold cough, cough very sticky, slightly into a solid twig strip, even with bloodshot eyes, outside the hospital 3 sputum acid-fast bacilli were negative, anti-TB treatment for half a month is invalid, Cough suspected of tumor necrosis tissue to “lung cancer to be excluded” on November 22 transferred to our hospital. Physical examination had emphysema