Abstract

After non-curative endoscopic submucosal dissection (ESD) for differentiated-type early gastric cancer (EGC), if a positive lateral margin (LM) or piecemeal resection is the only non-curative factor, non-surgical management (close observation or immediate additional endoscopic treatment) can be performed instead of gastrectomy due to the negligible risk of metastasis. However, the most appropriate management is unknown because of limited research.

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