“…Thus, examining contributing factors has attracted substantial research interest in the past decades [14,15,16,17,18,19,20,21,22,23,24,25]. Tumor size [14,15,16,17], CA19-9 level [18, 19], preoperative pain [20, 21], lymph node infiltration [16, 17,21,22,23,24] and vascular invasion [24, 25] have been found to be significant predictors for recurrence. This has also been confirmed by our study.…”