Feasibility Study of Sentinel Navigation Surgery in Early Gastric Cancer Using Fluorescence (SENORITA4)

1. Injection of Indocyanine Green (ICG) * Endoscopic injection of 0.25mg/ml of ICG on 4 sites around gastric cancer * Identification of sentinel basin using fluorescence laparoscopy * Laparoscopic sentinel basin dissection and identification of sentinel node at the back table 2. Surgical considerations * Conventional gastrectomy is performed if positive sentinel nodes are diagnosed in the frozen section. * If micrometastasis or isolated tumor cells in sentinel basin lymph nodes were diagnosed in permanent pathology, re-operation of conventional gastrectomy is not performed. * However, re-operation of conventional gastrectomy should be performed in case of macrometastasis, deep and lateral margin positive, more than pT2 lesion in the permanent pathology.