病历摘要：患者男性，75岁，石棉厂退休工人。因咳嗽、左胸痛、偶有血痰一月，于1980年6月29日入院。自63年起，受凉后咳嗽吐少量脓痰。入院前一月，因咳嗽，血痰胸透发现左肺门块影收入院。患者曾采煤8年，石棉厂担任筛棉及纸板工17年。63年诊断为混合性尘 Medical record summary: The patient is male, 75 years old, retired asbestos worker. He was admitted to hospital on June 29, 1980 due to cough, left chest pain and occasional bloody sputum. Since the beginning of 63 years, I have had a small amount of purulent sputum after getting cold. In the month before admission, the left hilar block was found in the hospital due to cough and chest pain. The patient had been mining coal for 8 years, and the asbestos plant served as screen cotton and cardboard for 17 years. 63 years of diagnostic dust