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Kanaka S, Yamada T, Matsuda A, Uehara K, Shinji S, Yokoyama Y, Takahashi G, Iwai T, Takeda K, Kuriyama S, Miyasaka T, Yoshida H. Short-term and three-year long-term outcomes of laparoscopic surgery versus open surgery for obstructive colorectal cancer following self-expandable metallic stent placement: a meta-analysis. Surg Endosc 2024:10.1007/s00464-024-11187-x. [PMID: 39210057 DOI: 10.1007/s00464-024-11187-x] [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: 10/24/2023] [Accepted: 08/17/2024] [Indexed: 09/04/2024]
Abstract
BACKGROUND A bridge to surgery (BTS) after self-expandable metallic stent (SEMS) placement is a widely recognized treatment strategy for obstructive colorectal cancer. However, there is still a lack of evidence for the efficacy and safety of laparoscopic surgery following SEMS placement. The aim of this systematic review and meta-analysis was to compare the short-term and long-term outcomes of laparoscopic surgery with those of open surgery following SEMS placement in patients with obstructive colorectal cancer. METHODS An electronic literature search through to December 2022 was performed to identify studies comparing short-term and long-term outcomes between laparoscopic and open surgery following SEMS placement for obstructive colorectal cancer. The main outcome measures were postoperative complication rates and mortality. Secondary outcome measures were the 3-year recurrence-free survival (RFS) and 3-year overall survival (OS) rates. The meta-analysis was performed using fixed-effect or random-effects methods to calculate odds ratios (ORs) with 95% confidence intervals (95% CIs). RESULTS The meta-analysis included 15 studies and 883 patients, of whom 467 (52.9%) underwent laparoscopic surgery and 416 (47.1%) underwent open surgery following SEMS placement. The postoperative complication rate was significantly lower in the laparoscopic surgery group than in the open surgery group (OR 0.47, 95% CI 0.32-0.67, P < 0.001). There was no significant difference in the 3-year RFS rate or 3-year OS rate between the laparoscopic and open surgery groups (3-year RFS, OR 0.78, 95% CI 0.50-1.24, P = 0.30; 3-year OS, OR 0.68, 95% CI 0.41-1.12, P = 0.13). CONCLUSION This meta-analysis found that the short-term outcome was better in patients who underwent laparoscopic surgery following SEMS placement than in those who underwent open surgery. Furthermore, there was no significant difference in long-term outcomes between the two groups. Laparoscopic surgery following SEMS placement may be a safe and effective treatment option for obstructive colorectal cancer.
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Affiliation(s)
- Shintaro Kanaka
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan.
| | - Takeshi Yamada
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Akihisa Matsuda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Kay Uehara
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Seiichi Shinji
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Yasuyuki Yokoyama
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Goro Takahashi
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Takuma Iwai
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Kohki Takeda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Sho Kuriyama
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Toshimitsu Miyasaka
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
| | - Hiroshi Yoshida
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-Ku, Tokyo, 113-8603, Japan
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Uemura K, Kondo N, Sudo T, Sumiyoshi T, Shintakuya R, Okada K, Baba K, Harada T, Murakami Y, Takahashi S. Long-term outcomes of neoadjuvant gemcitabine, nab-paclitaxel, and S1 (GAS) in borderline resectable pancreatic cancer with arterial contact: Results from a phase II trial. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2024; 31:351-362. [PMID: 38156372 DOI: 10.1002/jhbp.1412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/10/2023] [Accepted: 12/01/2023] [Indexed: 12/30/2023]
Abstract
BACKGROUND/PURPOSE This study reports the long-term results of a phase II trial evaluating the clinical efficacy of neoadjuvant gemcitabine, nab-paclitaxel, and S1 (GAS) in borderline resectable pancreatic cancer with arterial contact (BRPC-A). METHODS A multicenter, single-arm, phase II trial was conducted. Patients received six cycles of GAS and patients without progressive disease were intended for R0 resection. RESULTS Of the 47 patients, 45 (96%) underwent pancreatectomy. At the time of this analysis, all patients were updated with no loss to follow-up. A total of 30 patients died, while the remaining 17 patients were followed for a median of 68.1 months. The updated median overall survival (OS) was 41.0 months, with 2- and 5-year OS rates of 68.0% and 44.6%, respectively. Multivariate analysis in the preoperative model showed that a tumor diameter reduction rate ≥10% and a CA19-9 reduction rate ≥95% after neoadjuvant chemotherapy remained independently associated with favorable survival. In the postoperative multivariate model, no lymph node metastasis, no major surgical complications, and completion of adjuvant chemotherapy were independently associated with improved OS. CONCLUSIONS This long-term evaluation of the neoadjuvant GAS trial demonstrated the high efficacy of the regimen, suggesting that it is a promising treatment option for patients with BRPC-A.
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Affiliation(s)
- Kenichiro Uemura
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Naru Kondo
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takeshi Sudo
- Department of Surgery, Kure Medical Center and Chugoku Cancer Center, Hiroshima, Japan
| | - Tatsuaki Sumiyoshi
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Ryuta Shintakuya
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kenjiro Okada
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kenta Baba
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takumi Harada
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yoshiaki Murakami
- Department of Surgery, Hiroshima Memorial Hospital, Hiroshima, Japan
| | - Shinya Takahashi
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Ma X, He Q, Chen Y, Lu Y, Zhu P, Zhang J, Chen WS, Zhang Y, Zhang WH, Zhu C, Li Q, Li Z. Antibiotic prophylaxis after 48 h postoperatively are not associated with decreased surgical site infections and other healthcare associated infections in pancreatic surgery patients: a retrospective cohort study. Antimicrob Resist Infect Control 2023; 12:138. [PMID: 38042842 PMCID: PMC10693695 DOI: 10.1186/s13756-023-01348-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 11/28/2023] [Indexed: 12/04/2023] Open
Abstract
BACKGROUND It is controversial whether antibiotic should be used prophylactically 48 h after pancreatic surgery. Hence, the association of antibiotic prophylaxis (AP) after 48 h postoperatively with the incidence of surgical site infections (SSIs) and other healthcare-associated infections (HAIs) in patients receiving pancreatic surgery was evaluated. METHODS A retrospective cohort analysis was performed on 1073 patients who underwent pancreatic surgery. These patients were categorized into the non-AP after 48 h postoperatively group (n = 963) and the AP after 48 h postoperatively group (n = 110) based on whether or not they obtained AP from 48 h to 30 days after surgery. Outcomes included SSIs and other HAIs. RESULTS The incidence of SSIs in the non-AP after 48 h postoperatively group (98/963, 10.2%) was notably lower than that in the AP after 48 h postoperatively group (22/110, 20.0%) (P = 0.002). Other HAIs incidence was not significantly different between the non-AP after 48 h postoperatively group (77/963, 8.0%) and the AP after 48 h postoperatively group (11/110, 10.0%) (P = 0.468). Multiple regression analysis demonstrated that AP after 48 h postoperatively was a risk factor for SSIs (OR = 2.14, 95% CI 1.28-3.59) but not for other HAIs (OR = 1.24, 95% CI 0.63-2.42) after adjustment for age, gender, and diabetes. Subsequent to adjustment for all confounding factors, AP after 48 h postoperatively was not a influence factor for SSIs (OR = 2.13, 95% CI 0.76-5.99) and other HAIs (OR = 3.69, 95% CI 0.99-13.81). CONCLUSIONS AP after 48 h postoperatively following pancreatic surgery was not associated with the lower morbidity rate of SSIs and other HAIs. Nonetheless, this study may facilitate further development of strategies towards standardization of the duration of AP management of pancreatic surgery.
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Affiliation(s)
- Xiaoju Ma
- Department of Hospital Acquired Infection Control and Public Health Management, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Qiangsheng He
- Big Data Center, Scientific Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Clinical Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Youpeng Chen
- Department of Hospital Acquired Infection Control and Public Health Management, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Department of Infectious Diseases, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Yan Lu
- Department of Hospital Acquired Infection Control and Public Health Management, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Ping Zhu
- Department of Medical Services, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ji Zhang
- Department of Pharmacy, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Wen-Sen Chen
- Department of Infection Control, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Yongxiang Zhang
- Department of Infection Control, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Wei-Hong Zhang
- Department of Infection Control, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China
| | - Chuanlong Zhu
- Department of Infections Disease, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Qiang Li
- Pancreas Center, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China.
| | - Zhanjie Li
- Department of Infection Control, The First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, Jiangsu, China.
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Iseki M, Mizuma M, Unno M, Maruyama H, Akagi S, Shimoda M, Uemura K, Inoue T, Shiomi H, Watanabe M, Kobayashi M, Matsuda A, Mizuuchi Y, Aoki T, Shinkawa H, Takahata R, Makino K, Arai H, Yokoyama Y, Takeda S, Yaguchi Y, Kitagawa Y. Prognostic impact of postoperative infection after resection of biliary malignancy: A multicenter retrospective cohort study. Surgery 2023; 174:1145-1152. [PMID: 37599194 DOI: 10.1016/j.surg.2023.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 05/05/2023] [Accepted: 05/24/2023] [Indexed: 08/22/2023]
Abstract
BACKGROUND The aim of this study was to investigate the prognostic impact of postoperative infections in patients who underwent resection for biliary malignancy, including intrahepatic cholangiocarcinoma, perihilar cholangiocarcinoma, distal cholangiocarcinoma, gallbladder carcinoma, and carcinoma of the ampulla of Vater. METHODS This study was conducted in an 11-center retrospective cohort study. Patients with biliary tract cancer who underwent curative resection between April 2013 and March 2015 at 11 institutions in Japan were enrolled. We analyzed the prevalence of postoperative infection, infection-related factors, and prognostic factors. RESULTS Of the total 290 cases, 33 were intrahepatic cholangiocarcinoma, 60 were perihilar cholangiocarcinoma, 120 were distal cholangiocarcinoma, 55 were gallbladder carcinoma, and 22 were carcinoma of the ampulla of Vater. Postoperative infectious complications, including remote infection, were observed in 146 patients (50.3%), and Clavien-Dindo ≥III in 115 patients (39.7%). Postoperative infections occurred more commonly in the patients who received pancreaticoduodenectomy and bile duct resection. Patients with infectious complications had a significantly poorer prognosis than those without (median overall survival 38 months vs 62 months, P = .046). In a diagnosis-specific analysis, although there was no correlation between infectious complications and overall survival in intrahepatic cholangiocarcinoma, perihilar cholangiocarcinoma, distal cholangiocarcinoma, and carcinoma of the ampulla of Vater, infectious complications were a significantly poor prognostic factor in gallbladder carcinoma (P = .031). CONCLUSION Postoperative infection after surgery for biliary tract cancer commonly occurred, especially in patients who underwent pancreaticoduodenectomy and bile duct resection. Postoperative infection is relatively associated with the prognosis of patients with biliary malignancy, especially gallbladder carcinoma.
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Affiliation(s)
- Masahiro Iseki
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Masamichi Mizuma
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Maruyama
- Department of Surgery, Nippon Medical School, Tama-Nagayama Hospital, Tokyo, Japan; Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan
| | - Shinji Akagi
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Mazda Hospital, Hiroshima, Japan
| | - Mitsugi Shimoda
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Gastroenterological Surgery, Ibaraki Medical Center, Tokyo Medical University, Ibaraki, Japan
| | - Kenichiro Uemura
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Toru Inoue
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Gastrointestinal Surgery, Osaka City General Hospital, Japan
| | - Hisanori Shiomi
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Nagahama Red Cross Hospital, Shiga, Japan
| | - Manabu Watanabe
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Toho University Ohashi Medical Center, Tokyo, Japan
| | - Minako Kobayashi
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Infection Control and Prevention, Nippon Medical School, Musashikosugi Hospital, Kanagawa, Japan
| | - Akihisa Matsuda
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Nippon Medical School, Tokyo, Japan
| | - Yusuke Mizuuchi
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Taku Aoki
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Hepato-Biliary-Pancreatic Surgery, Dokkyo Medical University, Tochigi, Japan
| | - Hiroji Shinkawa
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Hepatobiliary-Pancreatic Surgery, Osaka Metropolitan University Graduate School of Medicine, Japan
| | - Risa Takahata
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Medical Risk Management and Infection Control, National Defense Medical Collage, Saitama, Japan
| | - Kenta Makino
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Graduate School of Medicine, Kyoto University, Japan
| | - Hiroki Arai
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Nippon Medical School Chiba Hokusoh Hospital, Japan
| | - Yasuyuki Yokoyama
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Digestive Surgery, Nippon Medical School Musashikosugi Hospital, Kanagawa, Japan
| | - Shigeru Takeda
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Gastroenterological, Breast, and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, Japan
| | - Yoshihisa Yaguchi
- Clinical Research Support Committee, Japan Society for Surgical Infection, Tokyo, Japan; Department of Surgery, Sassa General Hospital, Tokyo, Japan
| | - Yuko Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan; The Japan Society of Surgical Infection, Tokyo, Japan
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Tomimaru Y, Eguchi H, Shimomura Y, Kitamura T, Inoue Y, Nagakawa Y, Ohba A, Onoe S, Unno M, Hashimoto D, Kawakatsu S, Hayashi T, Higuchi R, Kitagawa H, Uemura K, Kimura Y, Satoi S, Takeyama Y. Standard versus delayed initiation of S-1 adjuvant chemotherapy after surgery for pancreatic cancer: a secondary analysis of a nationwide cohort by the Japan Pancreas Society. J Gastroenterol 2023; 58:790-799. [PMID: 37329351 PMCID: PMC10366324 DOI: 10.1007/s00535-023-01988-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Based on the Japan Adjuvant Study Group of Pancreatic Cancer-01 results, S-1 adjuvant chemotherapy has been the standard in resected pancreatic ductal adenocarcinoma (PDAC) patients in Japan and elsewhere, initiated within 10 weeks after surgery. To assess the clinical impact of this timing, we conducted a secondary analysis of a nationwide survey by the Japan Pancreas Society. METHODS A total of 3361 patients were divided into two groups: 2681 (79.8%) initiating the therapy within 10 weeks after surgery (standard) and 680 (20.2%) after 10 weeks (delayed). We compared recurrence-free survival (RFS) and overall survival (OS) using the log-rank test and Cox proportional hazards model with conditional landmark analysis between the groups. Results were verified by adjustment with inverse-probability-of-treatment weighting (IPTW) analysis. RESULTS The median timing of S-1 adjuvant chemotherapy initiation was 50 days (interquartile range: 38-66). In the standard group, 5-year RFS and OS rates were 32.3-48.7%, respectively, compared with 25.0-38.7% in the delayed group. Hazard ratios (HRs) and 95% confidence intervals were 0.84 (0.76-0.93) for RFS (p < 0.001) and 0.77 (0.69-0.87) for OS (p < 0.001). The IPTW analysis yielded 5-year RFS rates of 32.1% and 25.3% in the standard versus delayed group, respectively [HR = 0.86 (0.77-0.96), p < 0.001] and 5-year OS rates of 48.3% and 39.8%, respectively [HR = 0.81 (0.71-0.92), p < 0.001]. CONCLUSIONS Initiation of S-1 adjuvant chemotherapy in resected PDAC patients within 10 weeks after surgery may offer survival benefit over later initiation.
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Affiliation(s)
- Yoshito Tomimaru
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka E-2, Suita, Osaka, 565-0871, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2 Yamadaoka E-2, Suita, Osaka, 565-0871, Japan.
| | - Yoshimitsu Shimomura
- Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University, Suita, Japan
- Department of Hematology, Kobe City Organization Kobe Medical Center General Hospital, Kobe, Japan
| | - Tetsuhisa Kitamura
- Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University, Suita, Japan
| | - Yosuke Inoue
- Division of Hepatobiliary-Pancreatic Surgery, Cancer Institute Hospital, Tokyo, Japan
| | - Yuichi Nagakawa
- Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, Tokyo, Japan
| | - Akihiro Ohba
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Shunsuke Onoe
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Michiaki Unno
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | | | - Shoji Kawakatsu
- Department of Gastroenterological Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
| | - Tsuyoshi Hayashi
- Center for Gastroenterology, Teine-Keijinkai Hospital, Sapporo, Japan
| | - Ryota Higuchi
- Department of Surgery, Institute of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | | | - Kenichiro Uemura
- Department of Surgery, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yasutoshi Kimura
- Department of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Sohei Satoi
- Department of Surgery, Kansai Medical University, Hirakata, Japan
- Division of Surgical Oncology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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