应用超声内镜(EUS)检查了21例食道癌和28例胃癌。结果显示:两者的EUS影像特征均表现为不规则的低回声肿块,伴部分或全部正常管壁结构的破坏;EUS对肿瘤浸润深度诊断正确率:食道癌为88.9％,胃癌为83.3％;对肿大淋巴结的显示率两者分别为90％,83.3％,而对转移性淋巴结诊断正确率分别为50％,80％。EUS对食道癌、胃癌患者临床治疗方案的选择、手术方式的确定和预后的评估有重要意义。 Endoscopic ultrasonography (EUS) was used to examine 21 cases of esophageal cancer and 28 cases of gastric cancer. The results showed that both EUS features were characterized by irregular hypoechoic mass with partial or complete destruction of normal wall structure. The accuracy of EUS in the diagnosis of tumor invasion was 88.9% for esophageal cancer and 83.3% for gastric cancer. The rate of display of enlarged lymph nodes was 90% and 83.3%, respectively, while the diagnostic accuracy of metastatic lymph nodes was 50% and 80%, respectively. EUS has important implications for the selection of clinical treatment options for patients with esophageal cancer and gastric cancer, the determination of surgical methods, and the evaluation of prognosis.