Abstract
Treatment of esophageal cancer in the remnant esophagus after esophagectomy is highly invasive, therefore, early detection and minimally invasive treatment are considered necessary. Consequently, we aimed to clarify the safety and efficacy of endoscopic submucosal dissection (ESD) for residual esophageal cancer compared to that for esophageal cancer in a normal cervical esophagus. This study involved 47 patients with 59 residual esophageal cancers and 92 patients with 107 cervical esophageal cancers in normal esophagus who underwent ESD between January 2008 and December 2023. Their clinicopathological findings and long-term outcomes were retrospectively collected and evaluated. The median tumor diameter was 13mm, and the median procedure time was 31minutes in remnant esophagus group, with no significant difference between the two groups. No serious complications such as perforation, massive intraoperative bleeding, and pneumonia were observed in the remnant group, except for one case of postoperative bleeding. The rates of complete resection and disease specific survival were not significantly different between two groups, with complete resection rate of 86.4% and 5-year disease-specific survival rate of 95.7% in the remnant esophagus group. No local recurrence was observed during the median observation period of 43months in the remnant esophagus group. ESD for superficial cancer of the remnant esophagus showed a high complete resection rate without serious complications and good local-regional control with no evidence of local recurrence. This indicates that ESD is a safe and useful treatment for superficial cancer of the remnant esophagus.
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