食道癌是消化道肿瘤中预后较差的肿瘤之一,早期即可出现淋巴结和远处脏器的转移。局限于粘膜下者,也有40%会出现淋巴结转移,发生率明显高于胃癌与结直肠癌(10%)[1]。关于食道癌的最佳治疗方式仍存有争论,除手术治疗外放射治疗是其主要的治疗方法之一,无论是在术前或术后,放射治 Esophageal cancer is one of the tumors with poor prognosis in digestive tract tumors. Early metastasis of lymph nodes and distant organs can occur. Confined to the submucosal, there are 40% of lymph node metastases, the incidence was significantly higher than gastric cancer and colorectal cancer (10%) [1]. The best treatment of esophageal cancer is still controversial, in addition to surgical treatment of radiation therapy is one of its main treatment, either in the preoperative or postoperative radiotherapy