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Kumar S, Bahdi F, Emelogu IK, Yu AC, Coronel M, Ge PS, Coronel E, Ajani JA, Weston B, Lynch P, Ross WA, Lee JH. How much progress have we made?: a 20-year experience regarding esophageal stents for the palliation of malignant dysphagia. Dis Esophagus 2022; 35:6479794. [PMID: 34937091 DOI: 10.1093/dote/doab085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/21/2021] [Indexed: 12/11/2022]
Abstract
Esophageal stents are widely used for the palliation of malignant esophageal obstruction. Advances in technology have made esophageal stenting technically feasible and widespread for such obstruction, but complications remain frequent. We present outcomes of a large cohort undergoing esophageal stent placement for malignant esophageal obstruction at a tertiary care cancer center. Patients who underwent placement of esophageal stents for malignancy-related esophageal obstruction between 1 January 2001 and 31 July 2020 were identified. Exclusion criteria included stents placed for benign stricture, fistulae, obstruction of proximal esophagus (proximal to 24 cm from incisors), or post-surgical indications. Patient charts were reviewed for demographics, procedure and stent characteristics, complications, and follow-up. A total of 242 patients underwent stent placement (median age: 64 years, 79.8% male). The majority, 204 (84.3%), had esophageal cancer. During the last two decades, there has been an increasing trend in the number of esophageal stents placed. Though plastic stents were previously used, these are no longer utilized. Complications are frequent and include early complications of pain in 68 (28.1%) and migration in 21 (8.7%) and delayed complications of recurrent symptoms of dysphagia in 46 (19.0%) and migration in 26 (10.7%). Over the study period, there has not been a significant improvement in the rate of complications. During follow-up, 92 (38%) patients required other enteral nutrition modalities after esophageal stent placement. No patient, treatment, or stent characteristics were significantly associated with stent complication or outcome. Esophageal stent placement is an increasingly popular method for palliation of malignant dysphagia. However, complications, particularly pain, migration, and recurrent symptoms of dysphagia are common. Almost 40% of patients may also require other methods of enteral access after esophageal stent placement. Given the high complication rates and suboptimal outcomes, removable stents should be considered as first-line in the case of poor palliative response.
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Affiliation(s)
- Shria Kumar
- Division of Digestive Health and Liver Diseases, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Firas Bahdi
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Ikenna K Emelogu
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Abraham C Yu
- Department of Medicine, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Martin Coronel
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Philip S Ge
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Emmanuel Coronel
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Jaffer A Ajani
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Brian Weston
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Patrick Lynch
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - William A Ross
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
| | - Jeffrey H Lee
- Department of Gastroenterology, Hepatology & Nutrition, MD Anderson Cancer Center, Houston, TX, USA
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Daoud ND, Ghoz H, Mzaik O, Zaver HB, McKinney M, Brahmbhatt B, Woodward T. Endoscopic Management of Luminal Strictures: Beyond Dilation. Dig Dis Sci 2022; 67:1480-1499. [PMID: 35212884 DOI: 10.1007/s10620-022-07396-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/04/2022] [Indexed: 12/19/2022]
Abstract
Luminal strictures can occur as part of many different gastrointestinal (GI) disorders anywhere along the GI tract and affect all age groups. The end goal of managing any stricture is to re-establish an adequate and durable luminal patency that is sufficient to resolve the presenting clinical symptoms. Treatment options can be generally categorized into medical, endoscopic, and surgical. However, within each of these categories, multiple different options are available. Therefore, choosing the best treatment modality is often challenging and depends on multiple factors including the type, location, and complexity of the stricture, as well as the preference of the treating physician. In this article, we will review the most current literature regarding foregut strictures, particularly esophageal and gastric, beyond dilation.
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Affiliation(s)
- Nader D Daoud
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA
| | - Hassan Ghoz
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA
| | - Obaie Mzaik
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA
| | - Himesh B Zaver
- Department of Internal Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Micah McKinney
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA
| | - Bhaumik Brahmbhatt
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA.
| | - Timothy Woodward
- Division of Gastroenterology and Hepatology, Mayo Clinic, 4500 San Pablo Road, Jacksonville, FL, 32224, USA
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Martin EJ, Bruggeman AR, Nalawade VV, Sarkar RR, Qiao EM, Rose BS, Murphy JD. Palliative Radiotherapy Versus Esophageal Stent Placement in the Management of Patients With Metastatic Esophageal Cancer. J Natl Compr Canc Netw 2020; 18:569-574. [DOI: 10.6004/jnccn.2019.7524] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Accepted: 12/11/2019] [Indexed: 11/17/2022]
Abstract
Background:Patients with advanced esophageal cancer often experience pain and dysphagia, yet the optimal palliative management remains unclear. This retrospective study evaluated outcomes and adverse effects of palliative radiotherapy (RT) compared with esophageal stenting among a cohort of U.S. veterans with metastatic esophageal cancer.Patients and Methods:We identified 1,957 veterans in the United States with metastatic esophageal cancer who received palliative RT to the esophagus or esophageal stenting, and assessed the risks of severe adverse effects, including esophageal fistula formation, perforation, obstruction, hemorrhage, and esophagitis. We determined palliative efficacy by evaluating pain and dysphagia scores before and after intervention. Multivariable analyses were used to control for potential confounding factors.Results:In our cohort, 1,593 patients underwent RT and 364 underwent esophageal stenting. The cumulative incidence of any severe adverse effect at 6 months was higher among patients who received stents compared with those who received RT (21.7% vs 12.4%;P<.0010). In multivariable analysis, patients who received stents had an increased risk of any severe adverse effect, including fistula, perforation, and hemorrhage (allP<.0500). Multivariable analysis also showed that, compared with stenting, RT was associated with more rapid and durable pain relief (P<.0010) with no difference in relief of dysphagia over time when accounting for pretreatment dysphagia scores (P=.1029).Conclusions:Compared with esophageal stenting, RT was associated with a decreased risk of adverse effects, greater pain relief, and equivalent relief of moderate to severe dysphagia over time. Unmeasured patient- or tumor-related factors could have influenced the choice of intervention, thereby impacting our study outcomes. To our knowledge, this is the largest study to date analyzing the comparative risks and benefits of palliative RT and esophageal stenting among patients with metastatic esophageal cancer.
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Affiliation(s)
- Emily J. Martin
- 1Department of Medicine, University of California, Los Angeles, Los Angeles, California; and
| | - Andrew R. Bruggeman
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
| | - Vinit V. Nalawade
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
| | - Reith R. Sarkar
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
| | - Edmund M. Qiao
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
| | - Brent S. Rose
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
| | - James D. Murphy
- 2Department of Radiation Medicine and Applied Sciences, University of California, San Diego, San Diego, California
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van der Bogt RD, Vermeulen BD, Reijm AN, Siersema PD, Spaander MCW. Palliation of dysphagia. Best Pract Res Clin Gastroenterol 2018; 36-37:97-103. [PMID: 30551864 DOI: 10.1016/j.bpg.2018.11.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 11/19/2018] [Indexed: 01/31/2023]
Abstract
Palliation of dysphagia is the cornerstone of palliative treatment in patients with incurable oesophageal cancer. Available palliative options for dysphagia are oesophageal stent placement and radiotherapy. In general, oesophageal stent placement is the preferred therapeutic option in patients with a relatively poor prognosis because of its rapid relief of dysphagia. Regardless of ongoing technical developments, recurrence of dysphagia and stent-related complications are still occurring. For patients with a relatively good prognosis, intra-luminal brachytherapy is advised because of its sustained palliation of dysphagia. Due to limited availability of intra-luminal brachytherapy in clinical practice, fractionated external beam radiation therapy is commonly applied as an alternative. Selection of the optimal palliative approach for patients remains however challenging as conclusive high-quality evidence is limited. Moreover, with the introduction of new palliative treatment options (e.g. palliative chemotherapeutic and radiotherapeutic options) and the concurrent change of patient characteristics, supporting evidence from large randomised studies is warranted.
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Affiliation(s)
- R D van der Bogt
- Department of Gastroenterology & Hepatology, Erasmus MC University Medical Centre, Rotterdam, the Netherlands.
| | - B D Vermeulen
- Department of Gastroenterology & Hepatology, Radboud University Medical Centre, Nijmegen, the Netherlands.
| | - A N Reijm
- Department of Gastroenterology & Hepatology, Erasmus MC University Medical Centre, Rotterdam, the Netherlands.
| | - P D Siersema
- Department of Gastroenterology & Hepatology, Radboud University Medical Centre, Nijmegen, the Netherlands.
| | - M C W Spaander
- Department of Gastroenterology & Hepatology, Erasmus MC University Medical Centre, Rotterdam, the Netherlands.
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Abstract
OPINION STATEMENT PURPOSE OF REVIEW: Esophageal stents are used in clinical practice for endoscopic treatment of a wide variety of esophageal diseases and conditions. This review provides key principles and a literature update on the utility and limitations of esophageal stenting in clinical practice. RECENT FINDINGS Indications for esophageal stenting can be subdivided into two groups. The first group consists of patients with malignant or benign dysphagia, in which an esophageal stent restores luminal patency. In the past years, temporary stent placement has increasingly been used in the therapeutic management of refractory benign esophageal strictures. When endoscopic repeated bougie dilation and other endoscopic treatment modalities have failed, an esophageal stent could be considered. Based on the literature, a fully covered self-expandable metal stent may be the preferred choice for the treatment of both malignant and benign dysphagia. The second group consists of patients with leakage from the esophageal lumen into the surrounding tissue. Esophageal leakage can be subdivided into three forms, benign esophageal perforations (iatrogenic and spontaneous), anastomotic leakage after reconstructive esophageal surgery, and fistula. In a carefully selected group of patients, a covered esophageal stent may be used for sealing off the leakage, thereby preventing further contamination of the tissue surrounding the defect. The past few years, several validated prediction tools have been developed that may assist clinicians in the selection of patients eligible for esophageal stent placement. Based on retrospective studies and expert opinion, a partially or fully covered self-expandable metal stent may have a role in treatment of esophageal leakage. Research do date supports the utilization of esophageal stents for the treatment of malignant or benign dysphagia and esophageal leakage.
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Affiliation(s)
- Bram D Vermeulen
- Department of Gastroenterology and Hepatology, Radboud University Medical Center, Geert Grooteplein-Zuid 8 (route 455), 6500, HB, Nijmegen, the Netherlands.
| | - Peter D Siersema
- Department of Gastroenterology and Hepatology, Radboud University Medical Center, Geert Grooteplein-Zuid 8 (route 455), 6500, HB, Nijmegen, the Netherlands
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Kini R, Ramanathan S, Thangavel P, Karunakaran P, Mohamed KS, Ananthavadivelu M. A simplified technique of esophageal self-expandable metallic stent placement without fluoroscopic and endoscopic guidance for treating esophageal carcinoma. TURKISH JOURNAL OF GASTROENTEROLOGY 2018; 29:82-88. [PMID: 29391312 DOI: 10.5152/tjg.2018.17112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND/AIMS Self-expandable metallic stent (SEMS) placement with fluoroscopic guidance is a commonly used technique to relieve obstruction in patients with esophageal carcinoma. However, it has disadvantages such as radiation exposure. SEMS placement with endoscopic guidance also has the disadvantages of causing discomfort to patients as the endoscope and SEMS assembly are simultaneously used and it needs two experts for the procedure to be performed. To overcome these disadvantages, a simplified technique for SEMS placement was developed that does not require fluoroscopic or endoscopic guidance. Our objective was to compare the efficacy and safety of this simplified technique with the conventional SEMS placement method. MATERIALS AND METHODS This is a retrospective study including patients with esophageal carcinoma who underwent SEMS placement for the palliation of dysphagia. RESULTS Sixty-two patients were placed on stents for the palliation for esophageal carcinoma, with 46 patients in the conventional technique group (group A) and 16 in the simplified technique group (group B). The duration of the procedure was considerably lesser in group B than in group A (2 min 53 s vs. 15 min 4 s, p=0.001). The technical success rate achieved in groups A and B were 97.82% and 100%, respectively. SEMS placement required two experts in the conventional technique whereas the simplified technique required only one expert. CONCLUSION The advantages of the simplified technique are as follows: technical ease, cost-effectiveness, no exposure to radiation, requirement of minimal manpower, and less time-consuming; these advantages make it the technique day-care procedure.
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Affiliation(s)
- Ratnakar Kini
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
| | - Sabarinathan Ramanathan
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
| | - Pugazhendhi Thangavel
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
| | - Premkumar Karunakaran
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
| | - Kani Shaik Mohamed
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
| | - Murali Ananthavadivelu
- Department of Medical Gastroenterology, Madras Medical College and Rajiv Gandhi Government General Hospital, Tamil Nadu, India
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Watanabe K, Hikichi T, Nakamura J, Takagi T, Suzuki R, Sugimoto M, Waragai Y, Kikuchi H, Konno N, Asama H, Takasumi M, Sato Y, Obara K, Ohira H. Feasibility of esophageal stent fixation with an over-the-scope-clip for malignant esophageal strictures to prevent migration. Endosc Int Open 2017; 5:E1044-E1049. [PMID: 29090243 PMCID: PMC5658212 DOI: 10.1055/s-0043-111793] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 05/09/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND STUDY AIMS Fixation of an esophageal self-expandable metal stent (SEMS) with an over-the-scope-clip (OTSC) system for a benign stricture to prevent migration has been reported. However, the efficacy of SEMS fixation with an OTSC for malignant esophageal stricture remains unclear. The aim of this retrospective study was to evaluate the feasibility of SEMS fixation with an OTSC for a malignant esophageal stricture. PATIENTS AND METHODS Twelve patients who underwent esophageal SEMS placement and fixation with an OTSC for a malignant esophageal stricture were included in this retrospective study. The primary endpoint was technical success. The secondary endpoint was clinical success, which was defined as an improvement of at least 1 grade in the dysphagia score 1 week after SEMS placement or changes in the dysphagia score from before SEMS placement to 1 week after SEMS placement. RESULTS The technical success rate was 100 %. The clinical success rate was 92.3 %. In 6 mild stricture cases in which a standard peroral endoscope could be used, no migration of the SEMS was observed. The median dysphagia score before and at 1 week after SEMS placement was 3 (range 2 - 4) and 0 (0 - 4), respectively, which indicated improvement at 1 week after SEMS placement compared with before SEMS placement ( P = 0.002). There were no adverse events associated with placement of SEMS and deployment of an OTSC. CONCLUSIONS SEMS fixation with an OTSC is feasible for prevention of migration due to a malignant esophageal stricture.
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Affiliation(s)
- Ko Watanabe
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan,Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Takuto Hikichi
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan,Corresponding author Takuto Hikichi, MD, PhD Director and Associate ProfessorDepartment of EndoscopyFukushima Medical University Hospital1 HikarigaokaFukushima, Japan, 960-1295+81-24-547-1586
| | - Jun Nakamura
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan,Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Tadayuki Takagi
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Rei Suzuki
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Mitsuru Sugimoto
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Yuichi Waragai
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan,Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Hitomi Kikuchi
- Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan,Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Naoki Konno
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Hiroyuki Asama
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Mika Takasumi
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Yuki Sato
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Katsutoshi Obara
- Department of Advanced Gastrointestinal Endoscopy, Fukushima Medical University, Fukushima, Japan
| | - Hiromasa Ohira
- Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan
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Uesato M, Akutsu Y, Murakami K, Muto Y, Kagaya A, Nakano A, Aikawa M, Tamachi T, Arasawa T, Amagai H, Muto Y, Matsubara H. Comparison of Efficacy of Self-Expandable Metallic Stent Placement in the Unresectable Esophageal Cancer Patients. Gastroenterol Res Pract 2017; 2017:2560510. [PMID: 28819356 PMCID: PMC5551542 DOI: 10.1155/2017/2560510] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/03/2017] [Indexed: 12/20/2022] Open
Abstract
This is a retrospective study to evaluate the prevention of complications of metallic stent placement in patients with unresectable advanced esophageal cancer. A total of 87 patients were treated with 4 types of metal stents in the esophagus over a period of 18 years. Stent placement was technically successful. The most common prior treatment was chemoradiotherapy. There were no significant differences in the rate of patients with no complications among the prior treatments. Approximately, 30% of patients had the most common chest pain in complications. Stent placement within one month after the completion of chemoradiotherapy should be avoided for the prevention of the chest pain. There was no significant difference in the rate of patients with no complications by lesion location. The rate of no complications was higher for the Niti-S stent than the Gianturco Z-stent or Ultraflex stent. Of note, no complications were noted for the Niti-S ultrathin stent at all. Among cases of stent-related death, the most common type of complication was respiratory disorder caused by the stent that seems to be thick and hard. Therefore, the stent with thin and flexible characteristics like the Niti-S ultrathin stent will solve the various problems of esophageal stent placement.
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Affiliation(s)
- Masaya Uesato
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Yasunori Akutsu
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Kentarou Murakami
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Yorihiko Muto
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Akiko Kagaya
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Akira Nakano
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Mizuho Aikawa
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Tomohide Tamachi
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Takahiro Arasawa
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Hiroyuki Amagai
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Yasuhide Muto
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
| | - Hisahiro Matsubara
- Department of Frontier Surgery, Chiba University Graduate School of Medicine, Chiba-shi, Chiba 260-8670, Japan
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