Results of additional surgery after endoscopic resection for t1 colorectal cancer in a french multicenter cohort

Aims A 10% risk of lymph node involvement is associated with submucosal (T1) colorectal carcinomas treated with endoscopic resection, potentially indicating additional surgical resection. The absence of four histological features recalled in the Japanese (JSCCR) and European (ESGE) guidelines allows in case of R0 resection to avoid additional surgery. We aimed to evaluate the results of complementary surgery after endoscopic resection for a T1 colorectal cancer in a Western population.