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Background  The perioperative factors predicting or influencing early pancreatic ductal adenocarcinoma recurrence are unclear. This study attempted to identify the predictive factors for early pancreatic ductal adenocarcinoma recurrence post-pancreatectomy and the influence of pre- and post- operative adjuvant therapy.    Methods  One hundred and fifteen patients undergoing curative resection for pancreatic ductal adenocarcinoma between 2000 and 2016 at our institution were retrospectively analyzed. Patients were divided into two groups: those who did ( n  = 34) and did not ( n  = 81) experience a recurrence within 6 months postoperatively.    Results  Multivariate analyses demonstrated postoperative CA19–9 de-normalization, no postoperative adjuvant chemotherapy, and serosal invasion were independent risk factors for early recurrence ( P  < 0.001,  P  = 0.001, and  P  = 0.010, respectively). A subgroup analysis showed patients with ( n  = 51) and without ( n  = 64) preoperative chemoradiotherapy had different predictors. Although postoperative adjuvant chemotherapy was not a significant indicator in patients with preoperative chemoradiotherapy, CA19–9 de-normalization and no postoperative adjuvant chemotherapy were significant indicators in patients without preoperative chemotherapy. Preoperative chemotherapy strongly prevented early local recurrence while postoperative adjuvant chemotherapy prevented early distant recurrence.    Conclusions  CA19–9 de-normalization was an important predictor of early recurrence of pancreatic ductal adenocarcinoma. Although postoperative adjuvant chemotherapy was an important preventive measure against early recurrence, particularly for distant recurrence, preoperative chemoradiotherapy could strongly prevent the early local recurrence of pancreatic ductal adenocarcinoma. These perioperative adjuvant therapies could have a complementary relationship.

bmc surgery

The predictors and patterns of the early recurrence of pancreatic ductal adenocarcinoma after pancreatectomy: the influence of pre- and post- operative adjuvant therapy