Purpose: Much attention has been paid to preoperative treatment as a new strategy especially for borderline resectable pancreatic cancer (BRPC). The purpose of this study was to define the optimal indication of neoadjuvant chemoradiotherapy (NACRT) for pancreatic cancer.
Methods: We analyzed consecutive 184 patients who had undergone pancreatic resection in Nara Medical University Hospital. Resectability status was classified by NCCN guidelines. Full-dose gemcitabine with concurrent radiation was used as NACRT. We evaluated 85 patients treated with NACRT in comparison with 99 patients without NACRT as control.
Results: The regimen of NACRT was well tolerated and feasible. The perioperative outcomes were almost comparable. The postoperative complications were significantly less frequent in NACRT group than non-NACRT group. The pathological effects on both resectable and borderline tumors were favorable in NACRT group compared to non-NACRT group. The overall survival of resectable pancreatic cancer was significantly better than that of BRPC regardless of whether the patients were treated with or without NACRT. The prognosis of the patients with NACRT in resectable tumors was significantly better than without, while there was no significant difference in BRPC. Furthermore, multivariate analysis of various factors in the patients with NACRT identified resectability status and completion of adjuvant chemotherapy as independent prognostic factors.
Conclusions: NACRT did not improve the prognosis of the patients with BRPC, although it induced substantial pathological antitumor effect. In contrast, the prognosis of resectable pancreatic cancer treated with NACRT was favorable. Therefore, resectable pancreatic cancer may be good indication for multimodal treatment including NACRT.
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