Objective To explore differential diagnosis value of adenosine deaminase(ADA),C-reactive protein(CRP)and carcinoembryonic antigen(CEA)for pleural effusions.

• 目的探讨腺苷脱氨酶(ADA)、C反应蛋白(CRP)、癌胚抗原(CEA)在胸腔积液中鉴别诊断的意义。