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对３２例结核性胸液及２３例癌性胸液病人于入院后第１，４，８天分别检测胸液及血清中的溶菌酶（ＬＺＭ）、癌胚抗原（ＣＥＡ）和糖链抗原５０（ＣＡ５０），并分别计算其比值，绘出平均比值动态变化曲线。结果３２例结核性胸液ＬＺＭ平均比值动态变化曲线逐渐增高，２３例癌性胸液曲线逐渐下降；３２例结核性胸液ＣＥＡ平均比值动态变化曲线逐渐下降，２３例癌性胸液曲线逐渐增高；两组ＣＡ５０平均比值动态变化曲线改变不明显。说明胸液血清中ＬＺＭ、ＣＥＡ平均比值动态变化曲线在结核性和癌性胸液鉴别诊断中有意义，而ＣＡ５０胸液和血清平均比值动态变化曲线在鉴别中意义不大
Thirty-two patients with tuberculous pleural effusion and 23 patients with cancerous pleural effusion were tested for lysozyme (LZM), carcinoembryonic antigen (CEA) and carbohydrate antigen 50 (CA50), respectively, and calculate the ratio, draw the average ratio of the dynamic curve. Results The dynamic curve of average ratio of LZM in 32 cases of tuberculous pleural effusion increased gradually. The curve of cancerous pleural effusion in 23 cases decreased gradually. The dynamic change curve of average ratio of CEA in 32 cases of tuberculous pleural effusion decreased gradually. The curve of cancerous pleural effusion in 23 cases increased gradually The dynamic change curve of CA50 average ratio of two groups did not change obviously. Description of pleural fluid serum LZM, CEA average ratio of the dynamic curve of tuberculous and cancerous pleural effusion in the differential diagnosis of significance, and CA50 pleural fluid and serum average ratio of dynamic curve in the identification of little significance