Abstract:Objective To summarize the clinical characteristics of newly‑developed lesions of early esophageal cancer and precancerous lesions after endoscopic submucosal dissection (ESD) , and to investigate the risk factors associated with metachronous multiple primary early esophageal cancers. Methods A retrospective analysis was conducted on clinical data and postoperative follow‑up results of 311 patients who underwent esophageal ESD at the Department of Gastroenterology, Taizhou People""s Hospital, from January 2018 to January 2020. The incidence and interval of newly‑developed lesions were documented, and the risk factors for metachronous multiple primary esophageal cancers were identified. Results Among the 311 patients, 1 case (0.3%) experienced local recurrence, 2 patients (0.6%) had synchronous multiple primary early esophageal cancers, and 27 cases (8.7%) had metachronous multiple primary early esophageal cancers. Multivariate regression analysis showed that lesion length (OR=5.728, 95%CI: 0.959‑34.208, P<0.001), Lugol‑voiding lesions (LVLs) with speckled distribution (OR=6.574, 95%CI: 2.163‑19.977, P<0.001), and high neutrophil‑to‑lymphocyte ratio (NLR) (OR=3.72, 95%CI: 2.144‑6.452, P<0.001) were independent risk factors for metachronous multiple primary early esophageal cancers. Conclusion Incidence of metachronous multiple primary early esophageal cancers is elevated in patients with long lesions, LVLs exhibiting speckled distribution, and high NLR. Therefore, close follow‑up is essential for patients displaying these identified risk factors.