“…When we examined the treatment of early stage tumors in the literature, cholecystectomy alone was a sufficient therapy for T1a tumors (7,16,17), but the possible necessity of further surgery for T1b tumors is under debate (7,16,(18)(19)(20)(21)(22)(23). Some authors have recommended simple cholecystectomy for T1b tumors (7,16,19,21), while others have recommended additional surgery including liver bed resection and lymph node dissection (20,22,23). Liver resection and regional lymphatic dissection should be performed for T2 tumors because nodal metastasis has been reported in up to 50% of cases (16).…”