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Background/Aims: To report the long-term survival and tumor recurrence outcomes in patients with superficial esophageal cancer(SEC) after complete non-curative endoscopic resection (ER). Methods: We retrieved ER data for 24 patients with non-curatively resected SEC. Non-curative resection was defined as the presence ofsubmucosal and/or lymphovascular invasion on ER pathology. Relevant clinical and tumor-specific parameters were reviewed. Results: The mean age of the 24 study patients was 66.3±8.3 years. Ten patients were closely followed up without treatment, while14 received additional treatment. During a mean follow-up of 59.0±33.2 months, the 3- and 5-year survival rates of all cases were90.7% and 77.6%, respectively. The 5-year overall survival rates were 72.9% in the close observation group and 82.1% in the additionaltreatment group (p=0.958). The 5-year cumulative incidences of all cases of recurrence (25.0% vs. 43.3%, p=0.388), primary ECrecurrence (10.0% vs. 16.4%, p=0.558), and metachronous EC recurrence (16.7% vs. 26.7%, p=0.667) were similar between the twogroups. Conclusions: Patients with non-curatively resected SEC showed good long-term survival outcomes. Given the similar oncologicoutcomes, close observation may be an option with appropriate caution taken for patients who are medically unfit to receive additionaltherapy

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