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Impact of intraoperative margin clearance on survival following pancreatoduodenectomy for pancreatic cancer: a systematic review and meta-analysis

The use of intraoperative margin revision to achieve margin clearance in patients undergoing pancreatoduodenectomy for pancreatic cancer is controversial. We performed a systematic review and meta-analysis to summarize the evidence of intraoperative margin revisions of the pancreatic neck and its im...

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Main Authors: Birgin, Emrullah (Author) , Rasbach, Erik (Author) , Téoule, Patrick (Author) , Rückert, Felix (Author) , Reißfelder, Christoph (Author) , Rahbari, Nuh Nabi (Author)
Format: Article (Journal)
Language:English
Published: 17 December 2020
In: Scientific reports
Year: 2020, Volume: 10, Pages: 1-10
ISSN:2045-2322
DOI:10.1038/s41598-020-79252-8
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1038/s41598-020-79252-8
Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s41598-020-79252-8
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Author Notes:Emrullah Birgin, Erik Rasbach, Patrick Téoule, Felix Rückert, Christoph Reissfelder & Nuh N. Rahbari

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520 |a The use of intraoperative margin revision to achieve margin clearance in patients undergoing pancreatoduodenectomy for pancreatic cancer is controversial. We performed a systematic review and meta-analysis to summarize the evidence of intraoperative margin revisions of the pancreatic neck and its impact on overall survival (OS). Nine studies with 4501 patients were included. Patient cohort was stratified in an R0R0-group (negative margin on frozen and permanent section), R1R0-group (revised positive margin on frozen section which turned negative on permanent section), and R1R1-group (positive margin on frozen and permanent section despite margin revision). OS was higher in the R1R0-group (HR 0.83, 95% CI 0.72-0.96, P = 0.01) compared to the R1R1-group but lower compared to the R0R0-group (HR 1.20; 95% CI 1.05-1.37, P = 0.008), respectively. Subgroup analyses on the use of different margin clearance definitions confirmed an OS benefit in the R1R0-group compared to the R1R1-group (HR 0.81; 95% CI 0.65-0.99, P = 0.04). In conclusion, intraoperative margin clearance of the pancreatic neck margin is associated with improved OS while residual tumor indicates aggressive tumor biology. Consensus definitions on margin terminologies, clearance, and surgical techniques are required. 
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