Abstract
Purpose
Pancreatic malignancy with mesenterico-portal venous involvement can be safely managed with en bloc vein resection with comparable survival outcomes. Non-constructible venous encasement is regarded as criteria of unresectability in pancreatic cancer. In long-standing extra-hepatic venous obstruction, hepatopetal blood flow is established by collateralization in the hepatoduodenal and mesenteric region. Their importance in pancreatic malignancies is being recently acknowledged.
Methods
The records of patients undergoing pancreatoduodenectomies were retrospectively evaluated from 2012 to 2019. Pre and intraoperative records of patients undergoing concomitant vein resection were evaluated for the presence of venous collaterals, and its impact on oncological management was studied.
Results
Over a period of 7 years, 947 pancreatoduodenectomies were performed, of which 56 patients underwent concomitant vein resection. Among these, six patients had significant collaterals due to venous obstruction. They had pancreatic adenocarcinoma (2), neuroendocrine tumour (2) and solid pseudopapillary epithelial neoplasm (2) respectively. All these patients successfully underwent pancreatoduodenectomy with vein resection without vascular reconstruction. Superior mesenteric vein (SMV) was resected in four patients, whereas spleno-portal junction was resected in two patients. Dominant collaterals were preserved in all, without compromising oncological safety. Bowel congestion was checked by tolerability to 20-minute mesenteric venous clamping test. There was no major morbidity or hospital mortality following this surgical approach.
Conclusion
We recommend vein resection without reconstruction (VROR) as a novel approach in locally advanced pancreatic tumours (due to non-constructible vein involvement) with significant venous collaterals and emphasize the need to assess venous collateralization pre and intraoperatively.
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Data availability
The data is represented in the manuscript in tables.
Abbreviations
- CD grade:
-
Clavien-Dindo grade
- CT:
-
Computed tomography
- DGE:
-
Delayed gastric emptying
- ERAS:
-
Enhanced recovery after surgery
- IMV:
-
Inferior mesenteric vein
- ISGPS:
-
International Study Group for Pancreatic Surgery
- LGV:
-
Left gastric vein.
- MDT:
-
Multidisciplinary team
- mFOLFIRINOX:
-
Modified FOLFIRINOX regimen
- NET:
-
Neuroendocrine tumour
- PDAC:
-
Pancreatic ductal adenocarcinoma
- NCCN:
-
National Comprehensive Cancer Network
- PD:
-
Pancreatoduodenectomy
- POPF:
-
Post-operative pancreatic fistula
- PV:
-
Portal vein
- SMA:
-
Superior mesenteric artery
- SMV:
-
Superior mesenteric vein
- SPEN:
-
Solid pseudopapillary epithelial neoplasm
- SSI:
-
Surgical site infection
- SV:
-
Splenic vein
- VROR:
-
Vein resection without reconstruction
- N:
-
Number of cases
- N/A:
-
Data not available
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Acquisition, analysis and interpretation of data, drafting of the article, critical revision for the intellectual content and final approval of the version to be submitted: RVK and VP. (both are shared first authors). Analysis and interpretation of data, drafting and revision of the article, critical revision for the intellectual content and final approval of the version to be submitted: MSB and VAC. Conception and design of the study, drafting and revision of the article, critical revision for intellectual content and final approval of the version to be submitted: SVS.
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The study data was collected in the course of common clinical practice, and accordingly, written informed consent was obtained from the patients before the surgical procedure. All procedures performed in the study were in accordance with the ethical standards of the institutional research committee. The protocol conformed to the “World Medical Association Declaration of Helsinki—Ethical Principles for Medical Research Involving Human subjects” adopted by the 18th WMA General Assembly, Helsinki, Finland, June 1964, as revised in Brazil 2013. In order to protect the patient information, HIPAA (Health Insurance Portability and Accountability Act) compliance was also ensured throughout the study. There was no requirement of any formal ethical approval as the data was collected in the course of common clinical practice, in retrospective manner.
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The research was presented as Poster in the Indian Chapter of International Hepato-Pancreato-Biliary Association conference held at Jaipur, India, on February 15–17, 2019. This manuscript has not been published previously and is not under consideration for publication elsewhere. It has been approved by all the authors listed and by authorities where this work was carried out. This manuscript will not be published elsewhere in the same form, in English or in any other language, including electronically without the written consent of the copyright-holder.
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Rugved V. Kulkarni and Vijayraj Patil are shared first authors.
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Kulkarni, R.V., Patil, V., Bhandare, M.S. et al. Vein resection without reconstruction (VROR) in pancreatoduodenectomy: expanding the surgical spectrum for locally advanced pancreatic tumours. Langenbecks Arch Surg 405, 929–937 (2020). https://doi.org/10.1007/s00423-020-01954-4
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DOI: https://doi.org/10.1007/s00423-020-01954-4