A retrospective study of endoscopic resection for 368 patients with early esophageal squamous cell carcinoma or precancerous lesions

Background To retrospectively investigate the clinicopathological features and prognosis of early esophageal squamous cell neoplasm (ESCN) treated with endoscopic resection (ER), especially, to compare the prognosis in patients with sm2 cancer and non-sm2 cancer.