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Wang Y, Wang Y, Zou L, Deng L, Wu T, Liu L, Jiang J, An T. Does the level of inferior mesenteric artery ligation affect short-term and long-term outcomes of patients with sigmoid colon cancer or rectal cancer? A single-center retrospective study. World J Surg Oncol 2022; 20:274. [PMID: 36045369 PMCID: PMC9434919 DOI: 10.1186/s12957-022-02741-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/22/2022] [Indexed: 11/21/2022] Open
Abstract
Background For sigmoid colon or rectal cancer, a definite consensus regarding the optimal level ligating the inferior mesenteric artery (IMA) has not been reached. We performed this study to determine whether the ligation level significantly affected short-term and long-term outcomes of patients with sigmoid colon or rectal cancer after curative laparoscopic surgery. Methods Medical records of patients with sigmoid colon or rectal cancer who had undergone curative laparoscopic surgery between January 2008 and December 2014 at the Department of Gastrointestinal Surgery, Guangdong Provincial Hospital of Traditional Chinese Medicine were reviewed. Then, the high tie group (HTG) was compared with the low tie group (LTG) in terms of short-term and long-term outcomes. Results Five-hundred ninety patients were included. No significant differences between two groups regarding baseline characteristics existed. HTG had a significantly higher risk of anastomotic fistula than LTG (21/283 vs 11/307, P = 0.040). Additionally, high ligation was proven by multivariate logistic regression analysis to be an independent factor for anastomotic fistula (P = 0.038, OR = 2.232, 95% CI: 1.047–4.758). Furthermore, LT resulted in better preserved urinary function. However, LTG was not significantly different from HTG regarding operative time (P = 0.075), blood transfusion (P = 1.000), estimated blood loss (P = 0.239), 30-day mortality (P = 1.000), ICU stay (P = 0.674), postoperative hospital stay (days) (P = 0.636), bowel obstruction (P = 0.659), ileus (P = 0.637), surgical site infection (SSI) (P = 0.121), number of retrieved lymph nodes (P = 0.501), and number of metastatic lymph nodes (P = 0.131). Subsequently, it was revealed that level of IMA ligation did not significantly influence overall survival (OS) (P = 0.474) and relapse-free survival (RFS) (P = 0.722). Additionally, it was revealed that ligation level did not significantly affect OS (P = 0.460) and RFS (P = 0.979) of patients with stage 1 cancer, which was also observed among patients with stage 2 or stage 3 cancer. Ultimately, ligation level was not an independent predictive factor for either OS or RFS. Conclusions HT resulted in a significantly higher incidence of anastomotic fistula and worse preservation of urinary function. Level of IMA ligation did not significantly affect long-term outcomes of patients with sigmoid colon or rectal cancer after curative laparoscopic surgery.
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Affiliation(s)
- Yawei Wang
- The First Department of Surgery, Shenzhen Traditional Chinese Medicine Hospital, Fuhua Road 1, Futian District, Shenzhen, 518033, Guangdong, People's Republic of China
| | - Yan Wang
- Department of Radiology, Shenzhen People's Hospital, Dongmen Road 1017, Luohu District, Shenzhen, 518020, Guangdong, People's Republic of China
| | - Liaonan Zou
- Department of General Surgery, The Affiliated Zhuhai Hospital, Guangdong Provincial Hospital of Traditional Chinese Medicine, Jingle Road 52, Xiangzhou District, Zhuhai, 519015, Guangdong, China.,Department of Gastrointestinal Surgery, Guangdong Provincial Hospital of Traditional Chinese Medicine, Dade Road 111, Yuexiu District, Guangzhou, 510006, Guangdong, China
| | - Lingna Deng
- Department of Pathology, Qingyuan People's Hospital, Yinquan Road B24, Qingcheng District, 511518, Qingyuan, Guangdong, People's Republic of China
| | - Tianchong Wu
- Department of Hepatobiliary and Pancreatic Surgery, Shenzhen People's Hospital, Dongmen Road 1017, Luohu District, Shenzhen, 518020, Guangdong, People's Republic of China
| | - Linsen Liu
- Department of Hepatobiliary and Pancreatic Surgery, Shenzhen People's Hospital, Dongmen Road 1017, Luohu District, Shenzhen, 518020, Guangdong, People's Republic of China
| | - Jiling Jiang
- The First Department of Surgery, Shenzhen Traditional Chinese Medicine Hospital, Fuhua Road 1, Futian District, Shenzhen, 518033, Guangdong, People's Republic of China.
| | - Tailai An
- Department of Hepatobiliary and Pancreatic Surgery, Shenzhen People's Hospital, Dongmen Road 1017, Luohu District, Shenzhen, 518020, Guangdong, People's Republic of China.
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2
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Crolla RM, Coffey JC, Consten EJC. The Mesentery in Robot-Assisted Total Mesorectal Excision. Clin Colon Rectal Surg 2022; 35:298-305. [PMID: 35975108 PMCID: PMC9365460 DOI: 10.1055/s-0042-1743583] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In recent decades, surgery for rectal cancer has evolved from an operation normally performed under poor vision with a lot of blood loss, relatively high morbidity, and mortality to a safer operation. Currently, minimally invasive rectal procedures are performed with limited blood loss, reduced morbidity, and minimal mortality. The main cause is better knowledge of anatomy and adhering to the principle of operating along embryological planes. Surgery has become surgery of compartments, more so than that of organs. So, rectal cancer surgery has evolved to mesorectal cancer surgery as propagated by Heald and others. The focus on the mesentery of the rectum has led to renewed attention to the anatomy of the fascia surrounding the rectum. Better magnification during laparoscopy and improved optimal three-dimensional (3D) vision during robot-assisted surgery have contributed to the refinement of total mesorectal excision (TME). In this chapter, we describe how to perform a robot-assisted TME with particular attention to the mesentery. Specific points of focus and problem solving are discussed.
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Affiliation(s)
- Rogier M.P.H. Crolla
- Department of Surgery, Laparoscopic and Robotic Gastrointestinal/Oncological Surgeon, Amphia Hospital, Breda, The Netherlands
| | - J. Calvin Coffey
- Department of Surgery, University Hospitals Group Limerick, Limerick, Ireland
| | - Esther J. C. Consten
- Department of Surgery, Laparoscopic and Robotic Gastrointestinal/Oncological Surgeon, Academic Medical Center Groningen, Groningen, The Netherlands
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3
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Huang X. Laparoscopic D3 lymph node dissection with left colic artery and sigmoid artery preservation in rectal cancer - a video vignette. Colorectal Dis 2021; 23:3034-3035. [PMID: 34459090 DOI: 10.1111/codi.15889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 07/13/2021] [Accepted: 08/06/2021] [Indexed: 12/30/2022]
Affiliation(s)
- Xing Huang
- The First Department of General Surgery (Department of Colorectal and Anal Surgery), Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University), Changsha, China
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Kruszewski WJ, Szajewski M, Ciesielski M, Buczek T, Kawecki K, Walczak J. Level of inferior mesenteric artery ligation does not affect rectal cancer treatment outcomes despite better cancer-specific survival after low ligation-randomized trial results. Colorectal Dis 2021; 23:2575-2583. [PMID: 34251082 DOI: 10.1111/codi.15798] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 06/20/2021] [Accepted: 06/22/2021] [Indexed: 12/14/2022]
Abstract
AIM In rectal cancer surgery, the problem about which of the mesenteric artery ligation variants (high or low) is more beneficial to the patient remains unsolved. Recent meta-analyses suggest that the risk of surgical complications is similar for both ligation variants. The main objective was to compare the survival time in both groups with a minimum 48 months' follow-up. Secondary objectives were comparison of the number of harvested lymph nodes, the complication rate and other selected data related to the surgery. METHOD This was a randomized, single-centre, unblinded clinical trial of adult patients (n = 130) with cT1-3M0/ycT0-3M0 rectal and rectosigmoid junction adenocarcinoma undergoing radical open surgery. The intervention level was inferior mesenteric artery ligation. RESULTS The mean and median survival in the whole group was 45 months, while in the survivor group it was 83 and 82 months. The survival for 1-5 years, overall survival and disease-free survival were similar in both groups. The cancer-specific survival time was longer in the low inferior mesenteric artery ligation group (P = 0.005 for all and P = 0.02 for pTNM Stage III patients) There were no differences in the incidence of anastomotic leakage and overall morbidity. The median number of lymph nodes located at the root of the inferior mesenteric artery was 1; the mean was 1.7. They were not metastatic in any case. The median total number of harvested nodes was similar in both groups. CONCLUSIONS In radically treated adenocarcinoma of the rectum and the rectosigmoid junction, the level of inferior mesenteric artery ligation below the left colic artery branch provides similar treatment results to inferior mesenteric artery ligation just below its branching from the aorta in relation to overall and disease-free survival, and the risk of complications. Low inferior mesenteric artery ligation results in better cancer-specific survival. The risk of metastases at the mesenteric nodes is negligible.
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Affiliation(s)
- Wiesław Janusz Kruszewski
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland.,Division of Propaedeutics of Oncology, Medical University of Gdańsk, Gdansk, Poland
| | - Mariusz Szajewski
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland.,Division of Propaedeutics of Oncology, Medical University of Gdańsk, Gdansk, Poland
| | - Maciej Ciesielski
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland.,Division of Propaedeutics of Oncology, Medical University of Gdańsk, Gdansk, Poland
| | - Tomasz Buczek
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland.,Division of Propaedeutics of Oncology, Medical University of Gdańsk, Gdansk, Poland
| | - Krzysztof Kawecki
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland
| | - Jakub Walczak
- Department of Oncological Surgery, Gdynia Oncology Centre, Gdynia, Poland
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Guidolin K, Covelli A, Chesney TR, Draginov A, Chadi SA, Quereshy FA. Apical lymphadenectomy during low ligation of the IMA during rectosigmoid resection for cancer. Surg Open Sci 2021; 5:1-5. [PMID: 34337371 PMCID: PMC8313841 DOI: 10.1016/j.sopen.2021.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/09/2021] [Accepted: 06/17/2021] [Indexed: 01/13/2023] Open
Abstract
Background Low ligation of the inferior mesenteric artery with preservation of the left colic artery may decrease the risk of colorectal anastomotic ischemia compared to high ligation at its origin. Low ligation leaves apical nodes in situ and is therefore paired with apical lymphadenectomy. We sought to compare relevant oncologic outcomes between high ligation and low ligation plus apical lymphadenectomy in rectosigmoid resection for colorectal cancer. Methods We conducted a retrospective cohort study. Patients receiving a rectosigmoid resection for cancer between January 2012 and July 2018 were included. Patients with metastatic disease and those who underwent low ligation without apical lymphadenectomy were excluded. Our primary outcome was nodal yield/metastasis. Secondary outcomes included perioperative complications, local recurrence, and overall survival. Results Eighty-four patients underwent high ligation and 89 low ligation plus apical lymphadenectomy (median follow-up 20 months). In the low-ligation group, a median of 2 (interquartile range = 1–3) apical nodes was resected; 4.1% were malignant, increasing pathologic stage in 25% of these patients. There were no differences in nodal yield, complications, anastomotic leak, local recurrence, or overall survival. Conclusion No differences were identified between high ligation and low ligation plus apical lymphadenectomy with respect to relevant clinical outcomes. Prospective trial data are needed to robustly establish the oncologic benefit and safety of the low ligation plus apical lymphadenectomy technique.
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Affiliation(s)
- Keegan Guidolin
- Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario.,Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario
| | - Andrea Covelli
- Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario.,Department of Surgery, University Health Network, Toronto, Ontario
| | - Tyler R Chesney
- Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario.,Department of Surgery, St. Michael's Hospital, Toronto, Ontario
| | - Arman Draginov
- Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario
| | - Sami A Chadi
- Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario.,Department of Surgery, University Health Network, Toronto, Ontario
| | - Fayez A Quereshy
- Division of General Surgery, Department of Surgery, University of Toronto, Toronto, Ontario.,Department of Surgery, University Health Network, Toronto, Ontario
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Kong M, Chen H, Xin Y, Jiang Y, Han Y, Sheng H. High ligation of the inferior mesenteric artery and anastomotic leakage in anterior resection for rectal cancer: a systematic review and meta-analysis of randomized controlled trial studies. Colorectal Dis 2021; 23:614-624. [PMID: 33131205 DOI: 10.1111/codi.15419] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/06/2020] [Accepted: 10/27/2020] [Indexed: 02/08/2023]
Abstract
AIM Surgeons have concerns whether high ligation (HL) of the inferior mesenteric artery (IMA) increases the incidence of anastomotic leakage (AL). This meta-analysis aimed to evaluate the influence of HL of the IMA on AL compared with low ligation (LL). METHODS PubMed, Embase, Web of Science, Cochrane Central Register of Controlled Trials and ClinicalTrials.gov databases were searched. Randomized controlled trial studies that compared HL with LL of the IMA in anterior resection for rectal cancer and reported AL outcomes were eligible for inclusion. The odds ratios and mean differences were analysed by a random-effects model. Trial sequential analysis was performed to minimize the risk of random errors. The Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach was used to evaluate the quality of evidence for outcomes. RESULTS Of the 531 records screened, five randomized controlled trials with 779 patients were selected for analysis. The pooled incidence of AL was 12.1% (95% Cl 7.77-18.26) in the HL group and 9.7% (95% Cl 5.79-15.82) in the LL group (OR 1.20, 95% CI 0.77-1.87, P = 0.42). In trial sequential analysis, the cumulative Z-score curve exceeded the futility boundary, although the required information size of 1060 had not been reached. The quality of evidence was judged to be high according to the GRADE approach. CONCLUSIONS This meta-analysis shows that HL of the IMA does not increase the incidence of AL in anterior resection for rectal cancer.
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Affiliation(s)
- Meng Kong
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Hongyuan Chen
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Yingying Xin
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Yugang Jiang
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
| | - Yue Han
- Department of Gastrointestinal Surgery, Shandong Provincial Third Hospital, Shandong University, Jinan, Shandong, China
| | - Hongguang Sheng
- Department of Gastrointestinal Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, 250021, China
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Zhang W, Yuan WT, Wang GX, Song JM. Anatomical study of the left colic artery in laparoscopic-assisted colorectal surgery. Surg Endosc 2019; 34:5320-5326. [PMID: 31834513 DOI: 10.1007/s00464-019-07320-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Accepted: 12/06/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND It is important for lymph node dissection around the inferior mesenteric artery (IMA) with preservation of the left colic artery (LCA) to be aware of the track and the length of the LCA. We aimed to investigate the branching pattern and trajectory of LCA and measure the distances from the root of the IMA to the origin of the LCA (D mm) and from the origin of LCA to intersection of LCA and IMV (d mm) during laparoscopic left-sided colorectal operations. METHODS We analyzed 106 patients who underwent laparoscope-assisted left-side colorectal surgery during laparoscopic surgery. The branching patterns among the IMA, LCA, and sigmoidal trunk were evaluated; the trajectory of LCA was examined; the D mm and d mm were measured using a length of silk in the surgical operation. RESULTS In 59.5% patients, the LCA arose independently from the sigmoidal trunk (type A); in 8.5% patients, the LCA and sigmoidal trunk arose from the IMA at the same point (type B); in 29.2% patients, the LCA and sigmoidal trunk had a common trunk (type C); the LCA did not exist in 2.8% (type D).The D mm and d mm for all cases ranged from 15.0 to 65.3 mm (median, 43.1 mm) and from 20.3 to 46.2 mm (median, 34.8 mm), respectively. 74.8% of the LCA went straight upper left and upward to proximal part of descending colon (type I), 25.2% went to the lower left at first, then turned to travel straight upward to proximal part of descending colon (type II). CONCLUSION This study showed the anatomic variations of LCA during laparoscopic left-sided colorectal operation, which would help surgeons safely perform laparoscopic surgery in the left-side colon and rectum.
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Affiliation(s)
- Wei Zhang
- The Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 on Jian-She-East Road, Zhengzhou, Henan Province, China
| | - Wei-Tang Yuan
- The Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 on Jian-She-East Road, Zhengzhou, Henan Province, China
| | - Gui-Xian Wang
- The Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 on Jian-She-East Road, Zhengzhou, Henan Province, China
| | - Jun-Min Song
- The Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Zhengzhou University, No. 1 on Jian-She-East Road, Zhengzhou, Henan Province, China.
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9
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Fan JKM, Liu J, Liu Z, Chen K, Zhang G, Yang X, Chan FSY, Lo CM. Application of transanal endoscopic operation device in laparoscopic assisted transanal total mesorectal excision for the treatment of ultra-low rectal carcinoma. SURGICAL PRACTICE 2018. [DOI: 10.1111/1744-1633.12304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Joe King-Man Fan
- Department of Surgery; The University of Hong Kong, Hong Kong Special Administrative Region; Shenzhen China
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Jianwen Liu
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Zhonghui Liu
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Kejin Chen
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Guixi Zhang
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Xuefei Yang
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Fion Siu-Yin Chan
- Department of Surgery; The University of Hong Kong, Hong Kong Special Administrative Region; Shenzhen China
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
| | - Chung-Mau Lo
- Department of Surgery; The University of Hong Kong, Hong Kong Special Administrative Region; Shenzhen China
- Department of Surgery; The University of Hong Kong-Shenzhen Hospital; Shenzhen China
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10
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Lee KH, Kim JS, Kim JY. Feasibility and oncologic safety of low ligation of inferior mesenteric artery with D3 dissection in cT3N0M0 sigmoid colon cancer. Ann Surg Treat Res 2018; 94:209-215. [PMID: 29629356 PMCID: PMC5880979 DOI: 10.4174/astr.2018.94.4.209] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/10/2017] [Accepted: 08/03/2017] [Indexed: 12/17/2022] Open
Abstract
Purpose There is no standard consensus for the ligation level of the inferior mesenteric artery during radical resection of sigmoid colon cancer. Especially, there is little research about low ligation combined with D3 dissection. The study was performed to compare feasibility and oncologic safety between low ligation with D3 dissection to high ligation in intermediately advanced sigmoid colon cancer. Methods From January 2008 to December 2013, 134 patients who underwent radical surgery for cT3N0M0 sigmoid colon cancer were evaluated retrospectively. Clinicopathologic factors and oncologic outcomes of high ligation (HL, n = 51) and low ligation (LL, n = 83) groups were compared. Results The mean operative time was significantly shorter in LL, and there was no difference in complications, distal margin or number of retrieved lymph node. The tumor size was significantly larger in HL, but there was no difference in number of metastatic lymph node, pT or pN stage. There was no difference in overall survival, disease-free survival, or local and systemic recurrence. Conclusion In cT3N0M0 sigmoid colon cancers, we suggest that low ligation with D3 dissection can be performed with feasibility and oncological safety.
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Affiliation(s)
- Kyung Ha Lee
- Department of Surgery, Chungnam National University Hospital, Daejeon, Korea
| | - Jin Soo Kim
- Department of Surgery, Chungnam National University Hospital, Daejeon, Korea
| | - Ji Yeon Kim
- Department of Surgery, Chungnam National University Hospital, Daejeon, Korea
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11
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Matsuda K, Yokoyama S, Hotta T, Takifuji K, Watanabe T, Tamura K, Mitani Y, Iwamoto H, Mizumoto Y, Yamaue H. Oncological Outcomes following Rectal Cancer Surgery with High or Low Ligation of the Inferior Mesenteric Artery. Gastrointest Tumors 2017; 4:45-52. [PMID: 29071264 DOI: 10.1159/000477805] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/24/2017] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The level of inferior mesenteric artery (IMA) ligation for anterior resection of rectal cancer has several considerations concerning oncological outcomes. The primary endpoint of this randomized controlled trial (RCT) was to assess bowel function between high and low ligation. This study was intended to clarify oncological outcome as the secondary endpoint. OBJECTIVE The aim of this study was to assess in a prospective RCT whether the ligation level of the IMA in rectal cancer influences oncological outcomes. METHODS Between February 2008 and December 2011, 100 patients who underwent anterior resection for rectal cancer were randomized to perform either high or low ligation of the IMA. Oncological outcomes was the secondary endpoint of this RCT, whereas assessing bowel function was the primary endpoint. This RCT was registered at clinicaltrials.gov (NCT00701012). RESULTS There were no differences between the groups in terms of clinical data except for tumor stage. There were more advanced-stage patients in the high ligation group (p = 0.046). There were no lymph node (LN) metastases in the root of the IMA in the high ligation group. The average number of harvested LNs for the high and low ligation groups was 16.7 and 14.9, respectively. There was no difference in disease-free survival (DFS), site of first recurrence, and overall survival (OS). When patients were in stage III, there was also no difference in DFS and OS. CONCLUSIONS The ligation level of the IMA in rectal cancer may not influence oncological outcomes. However, further large-scale RCTs are needed to conclude this issue.
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Affiliation(s)
- Kenji Matsuda
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Shozo Yokoyama
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Tsukasa Hotta
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Katsunari Takifuji
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Takashi Watanabe
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Koichi Tamura
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Yasuyuki Mitani
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Hiromitsu Iwamoto
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Yuki Mizumoto
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
| | - Hiroki Yamaue
- Second Department of Surgery, School of Medicine, Wakayama Medical University, Wakayama, Japan
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