BACKGROUND: Perineural invasion (PNI) has been reported as one of the sources of locoregional recurrence in resected pancreatic cancer (PC). However the impact of PNI in resected pancreatic cancer remains controversial. The purpose of this study was to determine the association between PNI status and clinical outcomes. METHODS: Publications were identified which assessed prognostic significance of PNI status in resected pancreatic cancer up to February 2013. A meta-analysis was performed to clarify the association between PNI status and clinical outcomes. RESULTS: A total of 21 studies met the inclusion criteria, covering 4,459 cases. Analysis of these data showed that intrapancreatic PNI was correlated with reduced overall survival only in resected pancreatic ductal adenocarcinoma (PDAC) patients (HR=1.982, 95%CI: 1.526-2.574, p=0.000). Extrapancreatic PNI was correlated with reduced overall survival in all resected pancreatic cancer patients (HR=1.748, 95%CI: 1.372- 2.228, p=0.000). Moreover, intrapancreatic PNI status may be associated with tumor recurrence in all resected pancreatic cancer patients (HR=2.714, 95%CI: 1.885-3.906, p=0.000). CONCLUSION: PNI was an independent and poor prognostic factor in resected PDAC patients. Moreover, intrapancreatic PNI status may be associated with tumor recurrence.
BACKGROUND: Perineural invasion (PNI) has been reported as one of the sources of locoregional recurrence in resected pancreatic cancer (PC). However the impact of PNI in resected pancreatic cancer remains controversial. The purpose of this study was to determine the association between PNI status and clinical outcomes. METHODS: Publications were identified which assessed prognostic significance of PNI status in resected pancreatic cancer up to February 2013. A meta-analysis was performed to clarify the association between PNI status and clinical outcomes. RESULTS: A total of 21 studies met the inclusion criteria, covering 4,459 cases. Analysis of these data showed that intrapancreatic PNI was correlated with reduced overall survival only in resected pancreatic ductal adenocarcinoma (PDAC) patients (HR=1.982, 95%CI: 1.526-2.574, p=0.000). Extrapancreatic PNI was correlated with reduced overall survival in all resected pancreatic cancerpatients (HR=1.748, 95%CI: 1.372- 2.228, p=0.000). Moreover, intrapancreatic PNI status may be associated with tumor recurrence in all resected pancreatic cancerpatients (HR=2.714, 95%CI: 1.885-3.906, p=0.000). CONCLUSION: PNI was an independent and poor prognostic factor in resected PDAC patients. Moreover, intrapancreatic PNI status may be associated with tumor recurrence.
Authors: Willemieke S Tummers; Sarah E Miller; Nutte T Teraphongphom; Adam Gomez; Idan Steinberg; David M Huland; Steve Hong; Sri-Rajasekhar Kothapalli; Alifia Hasan; Robert Ertsey; Bert A Bonsing; Alexander L Vahrmeijer; Rutger-Jan Swijnenburg; Teri A Longacre; George A Fisher; Sanjiv S Gambhir; George A Poultsides; Eben L Rosenthal Journal: Ann Surg Oncol Date: 2018-04-17 Impact factor: 5.344
Authors: Willemieke S Tummers; Arantza Farina-Sarasqueta; Martin C Boonstra; Hendrica A Prevoo; Cornelis F Sier; Jan S Mieog; Johannes Morreau; Casper H van Eijck; Peter J Kuppen; Cornelis J van de Velde; Bert A Bonsing; Alexander L Vahrmeijer; Rutger-Jan Swijnenburg Journal: Oncotarget Date: 2017-05-26