“…1). Of these, 3 studies were RCTs comparing standard D2 lymphadenectomy with spleenpreserving D2 lymphadenectomy [26,28,30] (Table 1), 1 was an RCT comparing standard D2 lymphadenectomy with pancreas-preserving D2 lymphadenectomy [27] ( Table 1), 6 were prospective studies examining the extent of lymphadenectomy [1,2,9,10,34,35] (Table 2), and 32 were retrospective studies [7, 8, 11, 12, 14-19, 21-23, 29, 36-51] (Table 3). The four RCTs examining spleen and/or pancreas preservation were evaluated and given Jadad scores between 1 and 3 ( Table 1).…”