胸膜疾病为呼吸内科常见病之一 ,其良恶性胸腔积液的鉴别诊断有时非常困难 ,我科自 1999年 10月至 2 0 0 1年 3月对2 0例疑难胸腔积液的患者施行了纤维支气管镜代胸腔镜检查术 ,报告如下 :1　对象与方法本组 2 0例 ,男 15例 ,女 5例 ,年龄 34～ 6 5岁 ,平均 5 0 .83岁。均为经 Pleural disease is one of the common respiratory diseases, the differential diagnosis of benign and malignant pleural effusion is sometimes very difficult, our department from October 1999 to March 2001 of 20 cases of patients with difficult pleural effusion were administered Thoracoscopy for fibrobronchoscopy, the report is as follows: 1 objects and methods in this group of 20 patients, 15 males and 5 females, aged 34 to 65 years old, with an average of 50.83 years. All through