目的：探讨食管癌外侵程度与腔内照射关系，以及对病人预后的影响。方法：１９９３年１０月～１９９４年３月，２３例中晚期食管癌病人接受外照射加腔内治疗，先常规外照射３８００ｃＧｙ／１９次，然后行Ｉｒ１９２腔内照射。结果：１３例生存１年以上，１０例生存不满１年，这两组病人的病变长度、ＣＴ最大外侵程度、管腔直径、生存期的平均值分别为６２ｃｍ，１１５ｍｍ、６３ｍｍ、１５７个月和８０ｃｍ、１９８ｍｍ、８３ｍｍ、７６个月。结论：食管癌病变长度小于５０ｃｍ，ＣＴ最大外侵不超过１５ｍｍ，管腔直径介于５～６ｍｍ之间，可能是腔内照射最好适应症 Objective: To investigate the relationship between the extent of esophageal cancer invasion and the intraluminal irradiation and the prognosis of patients. Methods: From October 1993 to March 1994, 23 patients with advanced esophageal cancer underwent external beam irradiation and intracavitary therapy. The external beam was initially exposed to 3800cGy / 19 times, followed by irradiation of Ir192 cavity. Results: Thirteen patients survived for more than 1 year and 10 patients survived for less than 1 year. The length of lesion, maximal invasion of CT, lumen diameter and survival time of the two groups were 62cm, 115mm, 6  3mm, 157 months and 80cm, 198mm, 83mm, 76 months. Conclusion: The length of esophageal cancer less than 5  0cm, CT maximum invasion of not more than 15mm, lumen diameter between 5 ~ 6mm, may be the best indication for endovascular irradiation