[Expert consensus on the multidisciplinary clinical practice of laparoscopic-endoscopic cooperative surgery combined with sentinel lymph node navigation surgery for early gastric cancer (2026 edition)].

With advancements in surgical techniques and the improvement of diagnosis and treatment levels for early gastric cancer (EGC), minimally invasive approaches and function preservation have become shared goals for both patients and clinicians. Laparoscopic-endoscopic cooperative surgery combined with sentinel lymph node navigation surgery (LECS-SNNS) has gained significant attention due to its dual advantages in minimal invasiveness and physiological function preservation. However, robust evidence to guide its clinical implementation remains limited. Therefore, this consensus systematically reviews the research evidence regarding the clinical application of LECS-SNNS in EGC and formulates 20 expert-based recommendations, which including preoperative assessment, surgical procedures, intraoperative endoscopic maneuvers, pathological diagnosis, postoperative management, and follow-up. This consensus aims to provide comprehensive guidance for the standardized application and promotion of LECS-SNNS, with the goal of advancing precision, minimally invasive, and function-preserving treatment for EGC.