胸腔积液是临床上一组常见的症候群，其病因较多，鉴别诊断仍是临床上常遇到的难题，特别是癌性胸液与结核性胸液有时较难区分。我们对一组癌性和结核性胸膜炎患者同时检测胸液中的癌胚抗原（ＣＥＡ）、糖类抗原１９～９（ＣＡ１９～９）、铁蛋白和腺昔脱氨酶（ＡＤＡ），评价 Pleural effusion is a clinically common group of symptoms, its etiology, differential diagnosis is still often encountered in clinical problems, especially in the case of cancerous pleural effusion and tuberculous pleural effusion is sometimes more difficult to distinguish. We evaluated carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA19-9), ferritin, and adenosine deaminase (ADA) in pleural effusions simultaneously in a group of patients with cancerous and tuberculous pleurisy