肺癌的发病率和死亡率均位居我国恶性肿瘤之首,是对民众健康危害最大的恶性肿瘤之一。早期肺癌通过手术等方式治疗预后良好,但是,临床前来就诊的肺癌患者绝大多数为中晚期,失去了最佳治疗时机。那么,肺癌为何发现时多为晚期?首先,早期肺癌的症状很不明显或很难引起人们重视。绝大多数的肺癌患者早期无任何症状,部分即使有症状者,其症状也往往缺乏特异性,难以引起患者甚至医生的重视,这是导致肺癌患者不能早期发现的重要原因。事实上,肺癌患者早期会出现一些症状,只是这些症状太过轻微或 The incidence and mortality of lung cancer are among the top of malignant tumors in our country and one of the most harmful to people’s health. Early lung cancer treatment by surgery, etc. The prognosis is good, however, the vast majority of patients with clinical lung cancer in the advanced stage, lost the best timing of treatment. So, why the discovery of lung cancer is more advanced? First of all, the symptoms of early lung cancer is not obvious or very difficult to draw attention. The vast majority of patients with lung cancer early without any symptoms, some even if the symptoms, the symptoms are often lack of specificity, it is difficult to cause patients and even doctors attention, which led to lung cancer patients can not be an important reason for early detection. In fact, some symptoms of early lung cancer patients, but these symptoms are too mild or