Major postoperative complication rates (MSKCC score ≥ 3) of the PDS and NACT–IDS groups were 52.6% (29/55) and 6.0% (3/55), respectively (P = 0.0001). Postoperative mortality rate was 3.6% (2/55) and 0% (0/55) in the PDS and NACT–IDS groups, respectively (P = 0.154).