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Ozsay O, Aydin MC, Karabulut K, Basoglu M, Dilek ON. Venous reconstruction thrombosis after pancreaticoduodenectomy with superior mesenteric/portal vein resection due to pancreatic cancer: an 8 years single institution experience. Acta Chir Belg 2024; 124:200-207. [PMID: 37767719 DOI: 10.1080/00015458.2023.2264630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 09/22/2023] [Indexed: 10/07/2023]
Abstract
BACKGROUND Superior mesenteric/portal vein reconstruction (SMPVR) thrombosis remains a challenging complication following pancreaticoduodenectomy concomitant with venous resection. In this context, we aimed to present our SMPVR experiences and identify potential clinicopathological factors that increased SMPVR thrombosis. METHODS A total of 33 patients who underwent SMPVR during pancreaticoduodenectomy were analyzed. Of these, 26 patients who experienced pancreatic head ductal adenocarcinoma met our inclusion criteria. Patients' data were compared as classified by SMPVR type and the development of SMPVR thrombosis. All interposition grafts were Dacron in this cohort. RESULTS Types of SMPVR included: tangential resection with primary repair (n = 12); segmental resection with splenic vein preservation and either primary anastomosis (n = 8) or 14 mm tubular Dacron grafting (n = 1); segmental resection with splenic vein division either 14 mm tubular Dacron grafting (n = 2) or 14/7 mm 'Y'-shaped Dacron grafting (n = 3). A total of four patients having 14/7 mm 'Y'-shaped (n = 3) and 14 mm tubular Dacron (n = 1) developed SMPVR thrombosis (p = .001). Dacron grafting (p = .001) and splenic vein division (p = .010) were associated with SMPVR thrombosis. The median time to detection of SMPVR thrombosis was 4.3 months (2.5-21.0 months). The median follow-up time was 12.2 months (3.0-45 months). CONCLUSIONS During pancreaticoduodenectomy for pancreatic head ductal carcinoma, extended venous resection requiring SMPVR with 'Y'-shaped and use of Dacron interposition grafts appeared to be associated with the development of SMPVR thrombosis. This result warrants further investigations.
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Affiliation(s)
- Oguzhan Ozsay
- Department of Gastrointestinal Surgery, Ondokuz Mayıs University School of Medicine, Samsun, Turkey
| | - Mehmet Can Aydin
- Department of Gastrointestinal Surgery, Ondokuz Mayıs University School of Medicine, Samsun, Turkey
| | - Kagan Karabulut
- Department of General Surgery, Ondokuz Mayıs University School of Medicine, Samsun, Turkey
| | - Mahmut Basoglu
- Department of General Surgery, Ondokuz Mayıs University School of Medicine, Samsun, Turkey
| | - Osman Nuri Dilek
- Department of General Surgery, Katip Çelebi University School of Medicine, İzmir, Turkey
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Zwart ES, Yilmaz BS, Halimi A, Ahola R, Kurlinkus B, Laukkarinen J, Ceyhan GO. Venous resection for pancreatic cancer, a safe and feasible option? A systematic review and meta-analysis. Pancreatology 2022; 22:803-809. [PMID: 35697587 DOI: 10.1016/j.pan.2022.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 02/28/2022] [Accepted: 05/02/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND In pancreatic ductal adenocarcinoma patients with suspected venous infiltration, a R0 resection is most of the time not possible without venous resection (VR). To investigate this special kind of patients, this meta-analysis was conducted to compare mortality, morbidity and long-term survival of pancreatic resections with (VR+) and without venous resection (VR-). METHODS A systematic search was performed in Embase, Pubmed and Web of Science. Studies which compared over twenty patients with VR + to VR-for PDAC with ≥1 year follow up were included. Articles including arterial resections were excluded. Statistical analysis was performed with the random effect Mantel-Haenszel test and inversed variance method. Individual patient data was compared with the log-rank test. RESULTS Following a review of 6403 papers by title and abstract and 166 by full text, a meta-analysis was conducted of 32 studies describing 2216 VR+ and 5380 VR-. There was significantly more post-pancreatectomy hemorrhage (6.5% vs. 5.6%), R1 resections (36.7% vs. 28.6%), N1 resections (70.3% vs. 66.8%) and tumors were significantly larger (34.6 mm vs. 32.8 mm) in patients with VR+. Of all VR + patients, 64.6% had true pathological venous infiltration. The 90-day mortality, individual patient data for overall survival and pooled multivariate hazard ratio for overall survival were similar. CONCLUSION VR is a safe and feasible option in patients with pancreatic cancer and suspicion of venous involvement, since VR during pancreatic surgery has comparable overall survival and complication rates.
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Affiliation(s)
- E S Zwart
- Amsterdam UMC, Amsterdam, Cancer Center Amsterdam, Netherlands Department of Surgery, the Netherlands
| | - B S Yilmaz
- Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany
| | - A Halimi
- Division of Surgery, CLINTEC, Karolinska Institute, Sweden; Department of Surgical and Perioperative Sciences, Umeå University Hospital, Sweden
| | - R Ahola
- Tampere University Hospital and Tampere University, Tampere, Finland
| | - B Kurlinkus
- Clinic of Gastroenterology, Nephrourology and Surgery, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - J Laukkarinen
- Tampere University Hospital and Tampere University, Tampere, Finland
| | - G O Ceyhan
- Department of General Surgery, HPB Unit, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey.
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Zhang Z, Zhou B, Zheng X, Huang P, Yan S. Use of the peritoneum or the round ligament of the liver in radical surgery for pancreatic cancer. Gland Surg 2021; 10:3075-3081. [PMID: 34926223 PMCID: PMC8637067 DOI: 10.21037/gs-21-712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 11/18/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND At present, the materials commonly used for venous reconstruction in radical surgery for pancreatic cancer combined with vascular reconstruction include artificial blood vessels, autologous veins, and allogeneic blood vessels, but these materials all have their own disadvantages. In contrast, the use of the peritoneum and the round ligament of the liver for radical surgery for pancreatic cancer combined with vascular reconstruction provides new options. METHODS A retrospective descriptive study was performed. Clinical data were collected from 11 patients (5 males and 6 females with a median age of 62 years and an age range of 48-72 years) who underwent pancreatic cancer surgery combined with resection and reconstruction of the portal vein (PV) and superior mesenteric vein (SMV) using the peritoneum (including the round ligament of the liver) from November 2018 to November 2020 in the Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, and the Department of General Surgery, Affiliated Hospital of Shaoxing University. Intraoperative conditions and postoperative conditions were observed. Data were analyzed using SPSS 19.0 Normally distributed measurement data are expressed as the mean ± SD, whereas nonnormally distributed measurement data are expressed as the median (range). Count data are expressed as absolute numbers. RESULTS (I) Intraoperative condition: all 11 patients completed the operation successfully, including total pancreatectomy (TP) in 4 patients and pancreatoduodenectomy (PD) in 7 patients. In the 11 patients, the duration of surgery was 503±183 min, and the volume of intraoperative bleeding was 332±268 mL. (II) Postoperative condition: of the 11 patients, 5 presented with complications, including pancreatic leak in 3 patients, bleeding in 1 patient, and thrombosis in 1 patient. Postoperative pathological examination showed that 10 of the 11 patients had adenocarcinoma, and 1 had a neuroendocrine tumor. CONCLUSIONS The peritoneum and the round ligament of the liver are feasible materials and provide clinical options for reconstruction of the PV and SMV.
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Affiliation(s)
- Zhuoliang Zhang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
- Department of Hepatobiliary Surgery, Affiliated Hospital of Shaoxing University, Shaoxing, China
| | - Bo Zhou
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xiang Zheng
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Pengfei Huang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Sheng Yan
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
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Filho JELP, Tustumi F, Coelho FF, Júnior SS, Honório FCC, Henriques AC, Dias AR, Waisberg J. The impact of venous resection in pancreatoduodectomy: A systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e27438. [PMID: 34622858 PMCID: PMC8500612 DOI: 10.1097/md.0000000000027438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 09/02/2021] [Accepted: 09/17/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Vein resection pancreatoduodenectomy (VRPD) may be performed in selected pancreatic cancer patients. However, the main risks and benefits related to VRPD remain controversial. OBJECTIVE This review aimed to evaluate the risks and survival benefits that the VRPD may add when compared with standard pancreatoduodenectomy (PD). METHODS A systematic review and meta-analysis of studies comparing VRPD and PD were performed. RESULTS VRPD was associated with a higher risk for postoperative mortality (risk difference: -0.01; 95% confidence interval [CI] -0.02 to -0.00) and complications (risk difference: -0.05; 95% CI -0.09 to -0.01) than PD. The length of hospital stay was not different between the groups (mean difference [MD]: -0.65; 95% CI -2.11 to 0.81). In the VRPD, the operating time was 69 minutes higher on average (MD: -69.09; 95% CI -88.4 to -49.78), with a higher blood loss rate (MD: -314.04; 95% CI -423.86 to -195.22). In the overall survival evaluation, the hazard ratio for mortality during follow-up on the group of VRPD was higher compared to the PD group (hazard ratio: 1.13; 95% CI 1.03-1.23). CONCLUSION VRPD is associated with a higher risk of short-term complications and mortality and a lower probability of survival than PD. Knowing the risks and potential benefits of surgery can help clinicians to properly manage pancreatic cancer patients with venous invasion. The decision for surgery with major venous resection should be shared with the patients after they are informed of the risks and prognosis.
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Affiliation(s)
| | - Francisco Tustumi
- Hospital Estadual Mario Covas, Santo Andre, SP, Brazil
- Universidade de São Paulo, Sao Paulo, SP, Brazil
| | - Fabricio Ferreira Coelho
- Hospital Estadual Mario Covas, Santo Andre, SP, Brazil
- Universidade de São Paulo, Sao Paulo, SP, Brazil
| | - Sérgio Silveira Júnior
- Hospital Estadual Mario Covas, Santo Andre, SP, Brazil
- Universidade de São Paulo, Sao Paulo, SP, Brazil
| | | | | | - André Roncon Dias
- Hospital Estadual Mario Covas, Santo Andre, SP, Brazil
- Universidade de São Paulo, Sao Paulo, SP, Brazil
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Labori KJ, Kleive D, Khan A, Farnes I, Fosby B, Line PD. Graft type for superior mesenteric and portal vein reconstruction in pancreatic surgery - A systematic review. HPB (Oxford) 2021; 23:483-494. [PMID: 33288403 DOI: 10.1016/j.hpb.2020.11.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/27/2020] [Accepted: 11/02/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Contemporary practice for superior mesenteric/portal vein (SMV-PV) reconstruction during pancreatectomy with vein resection involves biological (autograft, allograft, xenograft) or synthetic grafts as a conduit or patch. The aim of this study was to systematically review the safety and feasibility of the different grafts used for SMV-PV reconstruction. METHODS A systematic search was performed in PubMed and Embase according to the PRISMA guidelines (January 2000-March 2020). Studies reporting on ≥ 5 patients undergoing reconstruction of the SMV-PV with grafts during pancreatectomy were included. Primary outcome was rate of graft thrombosis. RESULTS Thirty-four studies with 603 patients were included. Four graft types were identified (autologous vein, autologous parietal peritoneum/falciform ligament, allogeneic cadaveric vein/artery, synthetic grafts). Early and overall graft thrombosis rate was 7.5% and 22.2% for synthetic graft, 5.6% and 11.7% for autologous vein graft, 6.7% and 8.9% for autologous parietal peritoneum/falciform ligament, and 2.5% and 6.2% for allograft. Donor site complications were reported for harvesting of the femoral, saphenous, and external iliac vein. No cases of graft infection were reported for synthetic grafts. CONCLUSION In selected patients, autologous, allogenic or synthetic grafts for SMV-PV reconstruction are safe and feasible. Synthetic grafts seems to have a higher incidence of graft thrombosis.
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Affiliation(s)
- Knut J Labori
- Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway.
| | - Dyre Kleive
- Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Ammar Khan
- Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Ingvild Farnes
- Department of Hepato-Pancreato-Biliary Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Bjarte Fosby
- Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Pål-Dag Line
- Department of Transplantation Medicine, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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Fancellu A, Petrucciani N, Porcu A, Deiana G, Sanna V, Ninniri C, Perra T, Celoria V, Nigri G. The Impact on Survival and Morbidity of Portal-Mesenteric Resection During Pancreaticoduodenectomy for Pancreatic Head Adenocarcinoma: A Systematic Review and Meta-Analysis of Comparative Studies. Cancers (Basel) 2020; 12:cancers12071976. [PMID: 32698500 PMCID: PMC7409306 DOI: 10.3390/cancers12071976] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/06/2020] [Accepted: 07/14/2020] [Indexed: 02/07/2023] Open
Abstract
Background: The literature is conflicting regarding oncological outcome and morbidity associated to portal–mesenteric resection during pancreaticoduodenectomy (PD) in patients with pancreatic head adenocarcinoma (PHAC). Methods: A meta-analysis of studies comparing PD plus venous resection (PD+VR) and standard PD exclusively in patients with adenocarcinoma of the pancreatic head was conducted. Results: Twenty-three cohort studies were identified, which included 6037 patients, of which 28.6% underwent PD+VR and 71.4% underwent standard PD. Patients who received PD+VR had lower 1-year overall survival (OS) (odds radio OR 0.79, 95% CI 0.67–0.92, p = 0.003), 3-year OS (OR 0.72, 95% CI 0.59–0.87, p = 0.0006), and 5-year OS (OR 0.57, 95% CI 0.39–0.83, p = 0.003). Patients in the PD+VR group were more likely to have a larger tumor size (MD 3.87, 95% CI 1.75 to 5.99, p = 0.0003), positive lymph nodes (OR 1.24, 95% CI 1.06–1.45, p = 0.007), and R1 resection (OR 1.74, 95% CI 1.37–2.20, p < 0.0001). Thirty-day mortality was higher in the PD+VR group (OR 1.93, 95% CI 1.28–2.91, p = 0.002), while no differences between groups were observed in rates of total complications (OR 1.07, 95% CI, 0.81–1.41, p = 0.65). Conclusions: Although PD+VR has significantly increased the resection rate in patients with PHAC, it has inferior survival outcomes and higher 30-day mortality when compared with standard PD, whereas postoperative morbidity rates are similar. Further research is needed to evaluate the role of PD+VR in the context of multimodality treatment of PHAC.
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Affiliation(s)
- Alessandro Fancellu
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
- Correspondence: ; Tel.: +39-079-22-8432
| | - Niccolò Petrucciani
- Department of Medical and Surgical Sciences and Translational Medicine, St. Andrea University Hospital, Sapienza University of Rome, Via di Grottarossa 1037, 00189 Rome, Italy; (N.P.); (G.N.)
| | - Alberto Porcu
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
| | - Giulia Deiana
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
| | - Valeria Sanna
- Unit of Medical Oncology, AOU Sassari, Via E. De Nicola, 07100 Sassari, Italy;
| | - Chiara Ninniri
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
| | - Teresa Perra
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
| | - Valentina Celoria
- Unit of General Surgery 2—Clinica Chirurgica, Department of Medical Surgical and Experimental Sciences, University of Sassari, V. le San Pietro 43, 07100 Sassari, Italy; (A.P.); (G.D.); (C.N.); (T.P.); (V.C.)
| | - Giuseppe Nigri
- Department of Medical and Surgical Sciences and Translational Medicine, St. Andrea University Hospital, Sapienza University of Rome, Via di Grottarossa 1037, 00189 Rome, Italy; (N.P.); (G.N.)
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7
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Pu N, Mu S, Fang Y, Yin H, Liu G, Zhao G, Zhang L, Wu W, Lou W. Survival outcomes of pancreaticoduodenectomy versus extended pancreaticoduodenectomy procedure for pancreatic head carcinoma: a propensity score matching study. Transl Cancer Res 2020; 9:1476-1486. [PMID: 35117495 PMCID: PMC8798580 DOI: 10.21037/tcr.2020.01.38] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/26/2019] [Indexed: 11/06/2022]
Abstract
BACKGROUND It is unclear if the modified extended pancreaticoduodenectomy (PD) has better outcome superior the conventional PD for patients with pancreatic head carcinoma (PHC). The objective of this study is to compare the survival outcomes of the classic PD procedure and the modified extended PD procedure for PHC. METHODS A total of 7,084 resected PHC patients with PD and extended PD procedure from the SEER database from 2004 to 2014 were stratified. With the utilization of propensity score matching (PSM), patient baseline characteristics were balanced to decrease the bias. Overall survival (OS) and cancer-specific survival (CSS) were analyzed in both groups. RESULTS Of the 7,084 patients, 6,541 (92.3%) and 543 (7.7%) patients received PD and extended PD surgical procedures, respectively. After 2:1 ratio of PSM, 543 patients with extended PD procedure and 1,084 patients with PD procedure were completely matched. The median CSS and OS for PD and extended PD group were 20.0 and 19.0 months, and 19.0 and 18.0 months, respectively. The 5-year CSS and OS rates for PD and extended PD group were 17.5% and 16.1%, and 13.9% and 13.1%, respectively. CONCLUSIONS There is no distinct difference in survival outcomes between PD and extended PD procedure in patients with PHC.
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Affiliation(s)
- Ning Pu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Sucheng Mu
- Department of Emergency Medicine, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Yuan Fang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Hanlin Yin
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Gao Liu
- Department of Liver Surgery and Transplantation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Guochao Zhao
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Lei Zhang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Wenchuan Wu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Wenhui Lou
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Oba A, Bao QR, Barnett CC, Al-Musawi MH, Croce C, Schulick RD, Del Chiaro M. Vascular Resections for Pancreatic Ductal Adenocarcinoma: Vascular Resections for PDAC. Scand J Surg 2020; 109:18-28. [PMID: 31960765 DOI: 10.1177/1457496919900413] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND AIMS It has become clear that vein resection and reconstruction for pancreatic ductal adenocarcinoma (PDAC) is the standard of care as supported by multiple guidelines. However, resection of large peri-pancreatic arteries remains debatable. MATERIALS AND METHODS This review examines the current state of vascular resection with curative intent for PDAC in the last 5 years. Herein, we consider venous (superior mesenteric vein, portal vein), as well as arterial (superior mesenteric artery, celiac trunk, hepatic artery) resection or both with or without reconstruction. RESULTS Improvement of multidrug chemotherapy has revolutionized care for PDAC that should shift traditional surgical thinking from an anatomical classification of resectability to a prognostic and biological classification. CONCLUSION The present review gives an overview on the results of pancreatectomy associated with vascular resection, with consideration of new perspectives offered by the availability of better systemic therapies.
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Affiliation(s)
- A Oba
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA.,Department of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Q R Bao
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA.,Department of Surgery, Oncology, and Gastroenterology, University of Padua, Padua, Italy
| | - C C Barnett
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA.,Department of Surgery, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, CO, USA
| | - M H Al-Musawi
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA
| | - C Croce
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA
| | - R D Schulick
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA.,University of Colorado Cancer Center, Denver, CO, USA
| | - M Del Chiaro
- Department of Surgery, Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Denver, CO, USA.,University of Colorado Cancer Center, Denver, CO, USA
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9
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Callejas GH, Concon MM, Rezende AQMD, Chaim EA, Callejas-Neto F, Cazzo E. PANCREATICODUODENECTOMY WITH VENOUS RESECTION: AN ANALYSIS OF 30-DAY MORBIDITY AND MORTALITY. ARQUIVOS DE GASTROENTEROLOGIA 2019; 56:246-251. [PMID: 31633719 DOI: 10.1590/s0004-2803.201900000-46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Accepted: 07/17/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND Pancreaticoduodenectomy (PD) with the resection of venous structures adjacent to the pancreatic head, even in cases of extensive invasion, has been practiced in recent years, but its perioperative morbidity and mortality are not completely determined. OBJECTIVE To describe the perioperative outcomes of PD with venous resections performed at a tertiary university hospital. METHODS A retrospective study was conducted, classified as a historical cohort, enrolling 39 individuals which underwent PD with venous resection from 2000 through 2016. Preoperative demographic, clinical and anthropometric variables were assessed and the main outcomes studied were 30-day morbidity and mortality. RESULTS The median age was 62.5 years (IQ 54-68); 55% were male. The main etiology identified was ductal adenocarcinoma of the pancreas (82.1%). In 51.3% of cases, the portal vein was resected; in 35.9%, the superior mesenteric vein was resected and in the other 12.8%, the splenomesenteric junction. Regarding the complications, 48.7% of the patients presented some type of morbidity in 30 days. None of the variables analyzed was associated with higher morbidity. Perioperative mortality was 15.4% (six patients). The group of individuals who died within 30 days presented significantly higher values for both ASA (P=0.003) and ECOG (P=0.001) scores. CONCLUSION PD with venous resection for advanced pancreatic neoplasms is a feasible procedure, but associated with high rates of morbidity and mortality; higher ASA e ECOG scores were significantly associated with a higher 30-day mortality.
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Affiliation(s)
- Guilherme Hoverter Callejas
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Cirurgia, Campinas, SP, Brasil
| | - Matheus Mathedi Concon
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Cirurgia, Campinas, SP, Brasil
| | | | - Elinton Adami Chaim
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Cirurgia, Campinas, SP, Brasil
| | - Francisco Callejas-Neto
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Cirurgia, Campinas, SP, Brasil
| | - Everton Cazzo
- Universidade Estadual de Campinas (UNICAMP), Faculdade de Ciências Médicas, Departamento de Cirurgia, Campinas, SP, Brasil
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10
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Zhang B, Kim M, Griffiths C, Shi Q, Duceppe E, Ruo L, Serrano PE. Incidence of Splanchnic Vein Thrombosis After Abdominal Surgery: A Systematic Review and Meta-analysis. J Surg Res 2019; 245:500-509. [PMID: 31446192 DOI: 10.1016/j.jss.2019.07.086] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 07/19/2019] [Accepted: 07/21/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Abdominal surgery may increase the risk of splanchnic vein thrombosis (SVT). We determined the incidence of SVT after abdominal surgery and identified groups at highest risk. MATERIALS AND METHODS MEDLINE and Embase were searched for clinical studies evaluating the incidence of postoperative SVT after abdominopelvic surgery. Study selection, data abstraction, and risk of bias assessment were carried out independently by two reviewers. Clinical heterogeneity was explored by subgroup analyses (i.e., type of intra-abdominal procedure and organ group). RESULTS Of 5549 abstracts screened, 48 were analyzed. Pooled incidence of SVT (n = 50,267) was 2.68% [95% confidence interval (CI), 2.24 to 3.11] (1347 events), I2 = 96%. Pooled incidence of SVT in high-risk procedures were splenectomy with devascularization (24%), hepatectomy in patients with cirrhosis (9%), and pancreatectomy with venous resection (5%). Pooled incidence of symptomatic and asymptomatic SVT was 1.02% (95% CI: 0.97% to 1.07%) and 0.98% (95% CI 0.88% to 1.07%), respectively. Most common causes of SVT-related mortality were irreversible thrombosis, bowel ischemia, liver failure, and gastrointestinal bleed. Most studies included were at a high risk of bias due to lack of prospective data collection and lack of SVT screening for all participants. CONCLUSIONS Incidence of SVT after abdominal surgery is low but remains a relevant complication. Patients undergoing procedures involving surgical manipulation of the venous system and splenectomy are at the highest risk. Given the life-threatening risks associated with SVT, there is a need for larger prospective studies on the incidence and impact of SVT after abdominal surgery.
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Affiliation(s)
- Betty Zhang
- DeGroote School of Medicine, McMaster University, Hamilton Ontario, Canada
| | - Minji Kim
- Department of Surgery, McMaster University, Hamilton Ontario, Canada
| | | | - Qian Shi
- DeGroote School of Medicine, McMaster University, Hamilton Ontario, Canada
| | - Emmanuelle Duceppe
- Department of Medicine, University of Montreal, Montreal, Qeubec, Canada; Centre de Recherche du Centre Hospitalier Universitaire de Montreal, Montreal, Qeubec, Canada
| | - Leyo Ruo
- Department of Surgery, McMaster University, Hamilton Ontario, Canada
| | - Pablo E Serrano
- Department of Surgery, McMaster University, Hamilton Ontario, Canada.
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11
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Goel N, D'Souza JW, Ruth KJ, Milestone B, Karachristos A, Nagarathinam R, Cooper H, Hoffman J, Reddy S. The Utility of Preoperative Vascular Grading in Patients Undergoing Surgery First for Pancreatic Cancer: Does Radiologic Arterial or Venous Involvement Predict Pathologic Margin Status? JOURNAL OF ONCOLOGY 2018; 2018:7675262. [PMID: 30186324 PMCID: PMC6110012 DOI: 10.1155/2018/7675262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 07/17/2018] [Indexed: 11/18/2022]
Abstract
Controversy exists on accurately grading vascular involvement on preoperative imaging for pancreatic ductal adenocarcinoma. We reviewed the association between preoperative imaging and margin status in 137 patients. Radiologists graded venous involvement based on the Ishikawa classification system and arterial involvement based on preoperative imaging. For patients with both classifications recorded, we categorized vascular involvement as "None," "Arterial only," "Venous only," or "Both" and examined the association of vascular involvement and pathologic margin status. Of 134 patients with Ishikawa classifications, 63%, 17%, 11%, and 9% were graded as I, II, III, and IV, respectively. Of 96 patients with arterial staging, 74%, 16%, and 10% were categorized as stages i, ii, and iii, respectively. Of 93 patients with both stagings, 61% had no vascular involvement, 7% had arterial only, 14% had venous only, and 17% had both involved. Ishikawa classification was strongly associated with a positive SMA and SMV margin (p<0.001). However, for arterial staging, there was no association with SMA or SMV margin. Overall, Ishikawa grading was more predicative of arterial involvement and remained significant on multivariate analysis. The use of diagnostic imaging in predicting positive margins is more accurate when using a venous grading system.
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Affiliation(s)
- Neha Goel
- Department of Surgical Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Jimson W. D'Souza
- Department of Surgical Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Karen J. Ruth
- Department of Biostatistics, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Barton Milestone
- Department of Radiology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Andreas Karachristos
- Department of Surgical Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Rajeswari Nagarathinam
- Department of Pathology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Harry Cooper
- Department of Pathology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - John Hoffman
- Department of Surgical Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
| | - Sanjay Reddy
- Department of Surgical Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
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12
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Negoi I, Beuran M, Hostiuc S, Negoi RI, Inoue Y. Surgical Anatomy of the Superior Mesenteric Vessels Related to Pancreaticoduodenectomy: a Systematic Review and Meta-Analysis. J Gastrointest Surg 2018; 22:802-817. [PMID: 29363018 DOI: 10.1007/s11605-018-3669-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 01/02/2018] [Indexed: 01/31/2023]
Abstract
BACKGROUND AND PURPOSE Mesopancreas dissection with central vascular ligation and the superior mesenteric artery (SMA)-first approach represent the cornerstone of current principles for radical resection for pancreatic head cancer. The surgeon dissecting around the SMV and SMA should be aware regarding the anatomical variants in this area. The aims of this systematic review and meta-analysis are to detail the surgical anatomy of the superior mesenteric vessels and to propose a standardized terminology with impact in pancreatic cancer surgery. METHODS We conducted a systematic search to identify all published studies in PubMed/MEDLINE and Google Scholar databases from their inception up to March 2017. RESULTS Seventy-eight studies, involving a total of 18,369 specimens, were included. The prevalence of the mesenteric-celiac trunk, replaced/accessory right hepatic artery (RRHA), common hepatic artery, and SMV inversion was 2.8, 13.2, 2.6, and 4.1%, respectively. The inferior pancreaticoduodenal artery has its origin into the first jejunal artery, SMA, and RRHA, in 58.7, 35.8, and 1.2% of cases, respectively. The SMV lacks a common trunk in 7.5% of cases. The first jejunal vein has a trajectory posterior to the SMA in 71.8% of cases. The left gastric vein drains into the portal vein in 58%, in splenic vein (SV) in 35.6%, and into the SV-PV confluence in 5.8% of cases. CONCLUSIONS Complex pancreaticoduodenal resections require detailed knowledge of the superior mesenteric artery and vein, which is significantly different from the one presented in the classical textbooks of surgery. We are proposing the concept of the first jejunopancreatic vein which impacts the current oncological principles of pancreatic head cancer resection.
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Affiliation(s)
- Ionut Negoi
- Carol Davila University of Medicine and Pharmacy Bucharest, No. 8 Floreasca Street, Sector 1, 014461, Bucharest, Romania. .,Department of General Surgery, Emergency Hospital of Bucharest, Romania, Bucharest, Romania.
| | - Mircea Beuran
- Carol Davila University of Medicine and Pharmacy Bucharest, No. 8 Floreasca Street, Sector 1, 014461, Bucharest, Romania.,Department of General Surgery, Emergency Hospital of Bucharest, Romania, Bucharest, Romania
| | - Sorin Hostiuc
- Carol Davila University of Medicine and Pharmacy Bucharest, No. 8 Floreasca Street, Sector 1, 014461, Bucharest, Romania.,Department of Legal Medicine and Bioethics, National Institute of Legal Medicine Mina Minovici, Bucharest, Romania
| | - Ruxandra Irina Negoi
- Carol Davila University of Medicine and Pharmacy Bucharest, No. 8 Floreasca Street, Sector 1, 014461, Bucharest, Romania
| | - Yosuke Inoue
- Department of Gastrointestinal Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
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13
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Potrc S, Ivanecz A, Pivec V, Marolt U, Rudolf S, Iljevec B, Jagric T. Impact Factors for Perioperative Morbidity and Mortality and Repercussion of Perioperative Morbidity and Long-term Survival in Pancreatic Head Resection. Radiol Oncol 2018. [PMID: 29520206 PMCID: PMC5839082 DOI: 10.1515/raon-2017-0036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Background The focus of the present study was to reveal any impact factors for perioperative morbidity and mortality as well as repercussion of perioperative morbidity on long-term survival in pancreatic head resection. Patients and methods In a retrospective study, clinic-pathological factors of 240 patients after pancreatic head (PD) or total resection were analyzed for correlations with morbidity, 30- and 90-day mortality, and long-term survival. According to Clavien–Dindo classification, all complications with grade II and more were defined as overall complications (OAC). OAC, all surgical (ASC), general (AGC) and some specific types of complications like leaks from the pancreatoenteric anastomosis (PEA) or pancreatic fistula (PF, type A, B and C), leaks from other anastomoses (OL), bleeding (BC) and abscesses (AA) were studied for correlation with clinic-pathological factors. Results In the 9-year period, altogether 240 patients had pancreatic resection. The incidence of OAC was 37.1%, ASC 29.2% and AGC 15.8%. ASC presented themselves as PL, OL, BC and AA in 19% (of 208 PD), 5.8%, 5.8%, and 2.5% respectively. Age, ASA score, amylase on drains, and pancreatic fistulas B and C correlated significantly with different types of complications. Overall 30- and 90-day mortalities were 5 and 7.9% and decreased to 3.5 and 5% in P2. Conclusions High amylase on drains and higher mean age were independent indicators of morbidity, whereas PL and BC revealed as independent predictor for 30-day mortality, and physical status, OAC and PF C for 90-day mortality.
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Affiliation(s)
- Stojan Potrc
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia
| | - Arpad Ivanecz
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia
| | - Vid Pivec
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia.,Department of Radiology, University Medical Centre Maribor, Maribor, Slovenia
| | - Urska Marolt
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia
| | - Sasa Rudolf
- Department of Radiology, University Medical Centre Maribor, Maribor, Slovenia
| | - Bojan Iljevec
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia
| | - Tomaz Jagric
- Department of Abdominal Surgery, Surgical Clinic, University Medical Centre Maribor, Maribor, Slovenia
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14
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Xie ZB, Gu JC, Zhang YF, Yao L, Jin C, Jiang YJ, Li J, Yang F, Zou CF, Fu DL. Portal vein resection and reconstruction with artificial blood vessels is safe and feasible for pancreatic ductal adenocarcinoma patients with portal vein involvement: Chinese center experience. Oncotarget 2017; 8:77883-77896. [PMID: 29100433 PMCID: PMC5652822 DOI: 10.18632/oncotarget.20847] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/17/2017] [Indexed: 12/19/2022] Open
Abstract
Evidence shows that portal vein resection (PVR) increase the resectability but does little benefit to overall survival in all pancreatic ductal adenocarcinoma (PDAC) patients. But for patients with portal vein involvement, PVR is the only radical choice. But whether the PDAC patients with portal vein involvement would benefit from radical pancreaticoduodenectomy with PVR or not is controversial. All 204 PDAC patients with portal vein involvement were enrolled in this study [PVR group, n=106; surgical bypass (SB) group, n=52; chemotherapy group, n=46]. Overall survival and prognostic factors were analyzed among three groups. Moreover, a literature review of 13 studies were also conducted. Among 3 groups, patients in PVR group achieved a significant longer survival (median survival: PVR group, 22.83 months; SB group, 7.26 months; chemotherapy group, 10.64 months). Therapy choice [hazard ratio (HR) =1.593, 95% confidence interval (CI) 1.323 to 1.918, P<0.001], body mass index (HR=0.772, 95% CI 0.559 to 0.994, P=0.044) and carbohydrateantigen 19-9 (HR=1.325, 95% CI 1.064 to 1.651, P=0.012) were independent prognostic factors which significantly affected overall survival. Pancreaticoduodenectomy combined with PVR and reconstruct with artificial blood vessels is a safe and an appropriate therapy choice for resectable PDAC patients with portal vein involvement.
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Affiliation(s)
- Zhi-Bo Xie
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Ji-Chun Gu
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Yi-Fan Zhang
- Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Lie Yao
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Chen Jin
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Yong-Jian Jiang
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Ji Li
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Feng Yang
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - Cai-Feng Zou
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
| | - De-Liang Fu
- Department of Pancreatic Surgery, Pancreatic Disease Institute, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, China
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15
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Hoshimoto S, Hishinuma S, Shirakawa H, Tomikawa M, Ozawa I, Wakamatsu S, Hoshi S, Hoshi N, Hirabayashi K, Ogata Y. Reassessment of the clinical significance of portal-superior mesenteric vein invasion in borderline resectable pancreatic cancer. Eur J Surg Oncol 2017; 43:1068-1075. [PMID: 28427822 DOI: 10.1016/j.ejso.2017.03.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/21/2017] [Accepted: 03/29/2017] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE The principal objective of this study is to clarify the prognostic significance of borderline resectable pancreatic cancer (BRPC). The second objective is to evaluate the prognostic impact of the depth of pathological venous invasion. METHODS The study included 122 pancreatic cancer patients who underwent curative surgery. All computed tomography scans of the patients were retrospectively interpreted and classified according to the NCCN guidelines, version 1.2016, as resectable (-) or borderline resectable (+) in each arterial (BR-A) and venous (BR-PV) involvement. RESULTS The overall survival (OS) rate was significantly higher in BR-A(-) patients (n = 94) than in BR-A(+) patients (n = 28) (P = 0.001), whereas there was no difference between BR-PV(-) (n = 101) and BR-PV(+) patients (n = 21) (P = 0.257). In a multivariate analysis, the independent predictors of OS included BR-A(+) (P = 0.002), lymph node metastasis (P = 0.008), pathological venous invasion (P = 0.003), and adjuvant chemotherapy (P = 0.001). Of 39 patients who underwent venous resection, no significant difference was observed between BR-PV(-) (n = 20) and BR-PV(+) patients (n = 19) in resection rate, lymph node metastasis, the presence of extrapancreatic nerve invasion, recurrence rate, frequency of initial recurrence at a liver or local site, and OS. Pathological venous invasion was significantly deeper in BR-PV(+) patients. However, the depth of invasion was not associated with OS. CONCLUSION The definition of venous involvement in the current guidelines predicted the depth of pathological venous invasion but not OS in BRPC patients. Further prospective, randomized studies are needed to establish treatment strategies for BRPC patients with isolated venous involvement.
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Affiliation(s)
- S Hoshimoto
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - S Hishinuma
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - H Shirakawa
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - M Tomikawa
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - I Ozawa
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - S Wakamatsu
- Department of Pathology, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - S Hoshi
- Department of Pathology, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - N Hoshi
- Department of Pathology, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - K Hirabayashi
- Department of Pathology, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
| | - Y Ogata
- Department of Hepato-Biliary-Pancreatic Surgery, Tochigi Cancer Center, 4-9-13 Yohnan, Utsunomiya, Tochigi, 320-0834, Japan.
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