胸腔积液是常见病 ,而且其病因多种多样 ,尤其是良、恶性肿瘤胸腔积液的鉴别诊断是临床医师的棘手难题。胸腔积液的诊断可以经胸片而确立。但对于少量胸腔积液应与胸膜肥厚区别［１］:侧卧位胸片可显示液体的流动 ,Ｂ超可以明确诊断。１是否要行胸穿（诊断性的）无疑大多数胸腔 Pleural effusion is a common disease, but also a variety of causes, especially in the differential diagnosis of benign and malignant pleural effusion is a difficult problem for clinicians. Diagnosis of pleural effusion can be established by the chest. But for a small amount of pleural effusion and pleural thickening difference [1]: lateral chest X-ray can show the flow of liquid, B can be a clear diagnosis. 1 Whether to wear chest wear (diagnostic) is undoubtedly the majority of the chest