据报道头颈部鳞癌患者同时发生食管或肺部肿瘤的比例在定０．３％～７．４％。头颈部癌患者发生食管瘤或肺癌的相对危险性比普通人群高３至２０倍。同步癌ｋｅｎ’ｈｒｏｎｏｕｓｔｕｍｏｒ）影响生存并改变治疗计划．所以有人提出对每一个头颈部癌患者常规行食管镜和支气管镜检 It has been reported that the proportion of esophageal or lung tumors in patients with head and neck squamous cell carcinoma is between 0.3% and 7.4%. The relative risk of developing esophageal or lung cancer in patients with head and neck cancer is 3 to 20 times higher than in the general population. Synchronous cancer ken’hronous tumor affects survival and changes treatment plan. Therefore, it was proposed to routinely perform esophagoscopy and bronchoscopy on each head and neck cancer patient.