Lung cancer is an important disease with a very high fatality rate in many countries. 摘要肺癌是中外各国均极重视且致死率甚高的一种癌症。
Commonly, these tumors have vascular or lymphatic invasion.High mitotic rate, necrosis and nuclear pleomorphism are also frequent. 此疾病常有淋巴及血管浸润，一旦扩散至颈部淋巴节往往视为不良预后，随之容易有远端转移而具高致死率。
