Fig. 2
Surgical procedure for proximal margin resection. During laparoscopically assisted gastrectomy (non-ICG group), a clip was inserted 2 cm proximally from the tumour in the yellow circle (A), which was verified using intraoperative abdominal radiography, shown in white markers in the yellow circle (B). The proximal resection margin (PRM) is indicated by the green arrow, for the non-ICG group, and the tumour border by the dashed yellow line (C). For totally laparoscopic-assisted gastrectomy (ICG group), on the day before surgery, 0.1 mL of ICG was injected submucosally in 4 sites (proximal part (Pr in white), distal part (Ds in white), and both lateral parts) around the tumour (T in yellow) (D). The camera light was changed to ICG mode, to reveal the proximal margin shown in green with yellow arrows representing the border. An EndoGIATM stapler was used to cut the PRM directly (E). The PRM is indicated by the green arrow, for the ICG group, and the tumour border by the dashed yellow line (F)