The difference between benign and malignant esophageal tumors is very obvious. If benign esophageal tumors do not have distant metastasis, nor do they have local invasion and lymph node metastasis around the esophagus. The benign tumor of esophagus can be cured after surgical removal of benign. In case of esophageal cancer, cancer cells can be found mainly in all layers of the esophagus, such as mucosal layer, submucosal layer, muscular layer and plasma layer, in order to confirm the diagnosis of esophageal cancer. After the diagnosis of esophageal cancer, local invasion as well as distant metastasis, such as metastasis to peri-esophageal lymph nodes, can occur. It can also metastasize to supraclavicular lymph nodes, as well as liver, lung, brain, bone, etc. These are the differences between benign tumors and malignant tumors, that is, benign tumors grow locally in an expansive manner, while malignant tumors grow locally in an infiltrative manner and have distant metastasis.