The Cohort Study of Early Esophageal Cancer or Precancerous Lesions Treated With Endoscopic Resection

The Cohort Study of Early Esophageal Cancer or Precancerous Lesions Treated With Endoscopic Resection

Endoscopic Submucosal Dissection (ESD) is currently the main method of treatment of early esophageal cancer and precancerous lesions. Therefore, the investigators are looking forward to conduct a cohort study on early esophageal cancer patients undergoing endoscopic treatment collected from Zhongshan Hospital, Fudan University, comparing the WHO standard with Japanese standard of endoscopic therapy diagnosis. In addition，the investigators will collect patients' detailed informations and analyze the risk factors for metastasis and recurrence of early esophageal cancer.

Inclusion Criteria:

1. Older than 15-year-old
2. Undergoing endoscopic Submucosal Dissection (ESD) in ZhongShan Hospital

Exclusion Criteria:

Preoperative patients with recurrence and Lost to follow-up of patients within 1 year