随着生活水平的提高、人均寿命的延长以及生活工作压力的增加,食管病变的发生率日益增高。对于那些晚期食管或贲门肿瘤失去手术机会的病人及食管肿瘤术后吻合口狭窄的病人,食管支架置入术为良好的姑息治疗方法。但是支架置入后,由于肿瘤生长,肉芽组织形成和纤维组织增生,使食管 With the improvement of living standards, life expectancy per capita life expectancy and increased pressure on the incidence of esophageal lesions increasing. Esophageal stent placement is a palliative treatment for those patients who have lost surgical opportunities for advanced esophageal or cardiac cancers, and for patients with anastomotic stenosis following esophageal neoplasms. However, after stent implantation, due to tumor growth, granulation tissue formation and fibrosis, so that the esophagus