Abstract
To study the diagnostic value of detection of carcinoembryonic antigen (CEA), cancer antigen 125 (CA125), cancer antigen 153 (CA153) and cancer antigen 199 (CA199) in pleural fluid samples for lung cancer. Immunoprotein quantity of CEA, CA125, CA153 and CA199 was analyzed in pleural fluid and serum from patients with lung cancer (52 cases) and in pleural fluid from non cancerous patients (50 cases) by chemiluminescence. The levels of CEA, CA125, CA153 and CA199 in pleural fluid of patients with lung cancer were significantly higher than those of non cancerous patients ( P < 0.01 or P < 0.05). In lung cancer patients, the levels of CEA, CA125, CA153 and CA199 in pleural fluid were obviously higher than those in serum ( P < 0.01 or P < 0.05). The sensitivity and the specificity of CEA+CA199 were 96.2% and 96.0%, respectively. Detection of CEA, CA125, CA153 and CA199 in pleural fluid might be helpful for diagnosing lung cancer, and the optimal combination for assay is CEA+CA199.
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