Sa1153 Prognosis of Recurrence after Endoscopic Resection for T1 Colorectal Carcinomas: Results of a Multicenter Questionnaire Survey Conducted by Japanese Society for Cancer of the Colon and Rectum

According to the Japanese Society for Cancer of the Colon and Rectum (JSCCR) guidelines, curative criteria of T1 colorectal carcinoma (CRC) after endoscopic resection (ER) are well/moderately differentiated or papillary carcinoma, no vascular invasion, submucosal invasion depth <1,000 μm, and budding grade 1, because of the very low risk of LN metastasis. It is still unclear whether salvage therapy improves the prognosis when recurrence occurs during the follow-up after ER for T1 CRC.