患者李××,男,63岁。因咳嗽、咳痰4～5年,伴胸闷、气短进行性加重半年来我站就诊,查体未发现明显异常体征,摄胸部正位片显示双肺纹理增重,双下肺可见不规则小阴影(S)。经询问既往病史及职业接触史,患者曾于1967年至1973年间在天水市物资局贮 Patient Lee × ×, male, 63 years old. Due to cough, expectoration 4 to 5 years, with chest tightness, shortness of breath progressive increase in the past six months I visited the clinic, physical examination found no obvious signs of abnormal chest radiography showed double lungs weight gain, visible double irregular lower lung Shadow (S). After asking about the past medical history and occupational exposure history, patients had in 1967 to 1973 in Tianshui Materials Bureau storage