International Session 63　　Robotic Surgery 2

Retropharyngeal (RP)node metastasis usually occurs in advanced pharyngeal cancers, and surgical removal is challenging due to its proximity to the internal carotid artery.The single-port(SP)da Vinci robotic system provides enhanced visualization and precise instrument control, enabling safe RP node dissection.We report a 71-year-old man with T1N1M0 posterior pharyngeal wall squamous cell carcinoma and a solitary RP node metastasis.He underwent transoral robotic surgery (TORS)with RP node dissection under tracheostomy ventilation.Indocyanine green(ICG)was used to localize the RP node, which was excised en bloc with preservation of critical structures, including the internal carotid artery and sympathetic chain.The patient resumed oral intake and was decannulated within four weeks.Transoral RP node dissection using the SP da Vinci system is a safe and feasible option for selected patients.The addition of ICG fluorescence imaging further improves intraoperative accuracy in this anatomically complex region.