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Okada N, Arimoto J, Nishiguchi T, Kobayashi M, Niikura T, Kuwabara H, Nakaoka M, Nakajima A, Chiba H. Effectiveness of switching endoscopists for repeat surveillance colonoscopy: a retrospective study. BMC Gastroenterol 2023; 23:347. [PMID: 37803276 PMCID: PMC10557195 DOI: 10.1186/s12876-023-02981-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/27/2023] [Indexed: 10/08/2023] Open
Abstract
BACKGROUND Surveillance colonoscopy decreases colorectal cancer mortality; however, lesions are occasionally missed. Although an appropriate surveillance interval is indicated, variations may occur in the methods used, such as scope manipulation or observation. Therefore, individual endoscopists may miss certain areas. This study aimed to verify the effectiveness of performing repeat colonoscopies with a different endoscopist from the initial procedure. METHODS We retrospectively reviewed a database of 8093 consecutive colonoscopies performed in the Omori Red Cross Hospital from January 1st 2018 to June 30th 2021. Data from repeat total colonoscopies performed within three months were collected to assess missed lesions. The patients were divided into two groups according to whether the two examinations were performed by different endoscopists (group D) or the same endoscopist (group S). The primary outcome in both groups was the missed lesion detection rate (MLDR). RESULTS Overall, 205 eligible patients were analyzed. In total, 102 and 103 patients were enrolled in groups D and S, respectively. The MLDR was significantly higher in group D (61.8% vs. 31.1%, P < 0.0001). Multivariate logistic regression analysis for the detection of missed lesions identified performance by the different endoscopists (odds ratio, 3.38; 95% CI, 1.81-6.30), and sufficient withdrawal time (> 6 min) (odds ratio, 3.10; 95% CI, 1.12-8.61) as significant variables. CONCLUSIONS Overall, our study showed a significant improvement in the detection of missed lesions when performed by different endoscopists. When performing repeat colonoscopy, it is desirable that a different endoscopist perform the second colonoscopy. TRIAL REGISTRATION This study was approved by the Institutional Review Board of the Omori Red Cross Hospital on November 28, 2022 (approval number:22-43).
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Affiliation(s)
- Naoya Okada
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
- Department of Gastroenterology and Hepatology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Japan
| | - Jun Arimoto
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Takanori Nishiguchi
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Mikio Kobayashi
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Toshihiro Niikura
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Hiroki Kuwabara
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Michiko Nakaoka
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan
| | - Atsushi Nakajima
- Department of Gastroenterology and Hepatology, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Japan
| | - Hideyuki Chiba
- Department of Gastroenterology, Omori Red Cross Hospital, 4‑30‑1, Chuo, Ota-Ku, Tokyo, 143‑8527, Japan.
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Samnani S, Khan R, Heitman SJ, Hilsden RJ, Byrne MF, Grover SC, Forbes N. Optimizing adenoma detection in screening-related colonoscopy. Expert Rev Gastroenterol Hepatol 2023:1-14. [PMID: 37158052 DOI: 10.1080/17474124.2023.2212159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
INTRODUCTION Screening-related colonoscopy is a vital component of screening initiatives to both diagnose and prevent colorectal cancer (CRC), with prevention being reliant upon early and accurate detection of pre-malignant lesions. Several strategies, techniques, and interventions exist to optimize endoscopists' adenoma detection rates (ADR). AREAS COVERED This narrative review provides an overview of the importance of ADR and other colonoscopy quality indicators. It then summarizes the available evidence regarding the effectiveness of the following domains in terms of improving ADR: endoscopist factors, pre-procedural parameters, peri-procedural parameters, intra-procedural strategies and techniques, antispasmodics, distal attachment devices, enhanced colonoscopy technologies, enhanced optics, and artificial intelligence. These summaries are based on an electronic search of the databases Embase, Pubmed, and Cochrane performed on December 12, 2022. EXPERT OPINION Given the prevalence and associated morbidity and mortality of CRC, the quality of screening-related colonoscopy quality is appropriately prioritized by patients, endoscopists, units, and payers alike. Endoscopists performing colonoscopy should be up to date regarding available strategies, techniques, and interventions to optimize their performance.
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Affiliation(s)
- Sunil Samnani
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Rishad Khan
- Division of Gastroenterology, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada
| | - Steven J Heitman
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Robert J Hilsden
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Michael F Byrne
- Division of Gastroenterology, University of British Columbia, Vancouver, BC, Canada
| | - Samir C Grover
- Division of Gastroenterology, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada
- Li Ka Shing Knowledge Institute, University of Toronto, Toronto, ON, Canada
| | - Nauzer Forbes
- Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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Chang A, Munjit P, Sriprayoon T, Pongpaibul A, Prachayakul V. Comparison of blue laser imaging and narrow band imaging for the differentiation of diminutive colorectal polyps: A randomized controlled trial. Surg Endosc 2022; 36:5743-5752. [PMID: 35182217 DOI: 10.1007/s00464-022-09079-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 01/25/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND To compare the diagnostic efficacy of blue laser imaging (BLI)- bright and narrow band imaging (NBI) modes of image enhanced endoscopy (IEE) in differentiating neoplastic and non-neoplastic lesions of diminutive colorectal polyps. METHODS We conducted a prospective randomized controlled trial from September 2015 to July 2016. The participants were randomly assigned (1:1) for colonoscopy with polyp classification under NBI or BLI-bright mode without magnification. Histopathologic diagnosis was used as the gold standard. RESULTS Three hundred and twenty-four diminutive polyps in 164 patients were included for analysis (BLI: 162 polyps in 73 patients, NBI: 162 polyps in 91 patients). These polyps were located at colon proximal to sigmoid (61.1 and 58.0%) and rectosigmoid colon (38.9 and 42.0%) in the BLI and NBI groups, respectively. Most polyps (71.9%) were adenomatous with one malignant polyp (0.3%). BLI achieved 86.4% accuracy, 98.3% sensitivity, 55.6% specificity, 85.2% positive predictive value (PPV), and 92.6% negative predictive value (NPV), similar to NBI which exhibited 90.1% accuracy, 99.1% sensitivity, 67.4% specificity, 88.5% PPV, and 96.9% NPV in the diagnosis of adenomatous polyps. Based on the location of the polyp, both modes of IEE provided ≥ 95% NPV for diagnosis of adenomatous polyps at the rectosigmoid colon. CONCLUSIONS BLI-bright and NBI modes of IEE have similar accuracy in differentiation between neoplastic and non-neoplastic lesions of diminutive polyps. Both modes provided ≥ 90% NPV which allows for the adaptation of the American Society of Gastrointestinal Endoscopy "diagnose-and-leave" recommended strategy for diminutive polyps at the rectosigmoid colon.
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Affiliation(s)
- Arunchai Chang
- Division of Gastroenterology, Department of Medicine, Hatyai Hospital, Songkhla, Thailand
| | - Parnwad Munjit
- Siriraj Gastrointestinal Endoscopy Center, Division of Gastroenterology, Department of Internal Medicine, Siriraj Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Tassanee Sriprayoon
- Siriraj Gastrointestinal Endoscopy Center, Division of Gastroenterology, Department of Internal Medicine, Siriraj Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
| | - Ananya Pongpaibul
- Department of Pathology, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Varayu Prachayakul
- Siriraj Gastrointestinal Endoscopy Center, Division of Gastroenterology, Department of Internal Medicine, Siriraj Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand.
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Yoshida N, Dohi O, Inoue K, Sugino S, Yasuda R, Hirose R, Naito Y, Inada Y, Murakami T, Ogiso K, Morinaga Y, Kishimoto M, Itoh Y. The efficacy of tumor characterization and tumor detectability of linked color imaging and blue laser imaging with an LED endoscope compared to a LASER endoscope. Int J Colorectal Dis 2020; 35:815-825. [PMID: 32088738 DOI: 10.1007/s00384-020-03532-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/07/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVES An endoscope with a light-emitting diode (LED) light source which has a 2-mm close-distance observation function without magnification, has been marketed, enabling linked color imaging (LCI) and blue laser imaging (BLI) for tumor detection and characterization. We analyzed the efficacy of a LED endoscope compared to a LASER endoscope. METHODS We retrospectively reviewed 272 lesions observed using the LED endoscopic system (Fujifilm Co., Tokyo, Japan) from May 2018 to September 2019. The Japanese NBI Classification was used for tumor characterization. We analyzed the diagnostic accuracy and confidence level. Sixty-one lesions observed with both the LED and magnified LASER endoscopes were also analyzed to compare the diagnostic accuracy. Regarding the tumor detectability, we calculated color difference values (CDVs) and brightness values (BVs) of white-light imaging, BLI, and LCI modes between the two endoscopes for each tumor. RESULTS The mean polyp size was 9.2 ± 11.3 mm. Histology showed 71 sessile serrated lesions, 193 adenoma and high-grade dysplasias, and 8 T1 cancers. The diagnostic accuracy of tumors ≥ 10 and < 10 mm was 72.0% and 92.9% (p < 0.001), respectively and the high confidence rate was 93.8%. The diagnostic accuracy of LED (77.0%) was a little higher than that of LASER without magnification (65.6%, p = 0.16) but was not inferior to that of LASER with magnification (82.0%, p = 0.50). The respective CDVs of LED and LASER endoscopes were 20.6 ± 11.2 and 21.6 ± 11.2 for LCI (p = 0.30), and the respective BVs were 210.0 ± 24.2 and 175.9 ± 21.1 (p < 0.001). CONCLUSIONS A LED endoscope with close-distance observation improved tumor detection and characterization due to high brightness.
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Affiliation(s)
- Naohisa Yoshida
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | - Osamu Dohi
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ken Inoue
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Satoshi Sugino
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ritsu Yasuda
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Ryohei Hirose
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Naito
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yutaka Inada
- Department of Gastroenterology
- , Fukuchiyama City Hospital, Kyoto, Japan
| | - Takaaki Murakami
- Department of Gastroenterology, JCHO Kyoto Kuramaguchi Medical Center, Kyoto, Japan
| | - Kiyoshi Ogiso
- Department of Gastroenterology, Osaka General Hospital of West Japan Railway Company, Osaka, Japan
| | - Yukiko Morinaga
- Department of Surgical Pathology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Mitsuo Kishimoto
- Department of Surgical Pathology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yoshito Itoh
- Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Sugawara S, Sone M, Morita S, Hijioka S, Sakamoto Y, Kusumoto M, Arai Y. Radiologic Assessment for Endoscopic US-guided Biliary Drainage. Radiographics 2020; 40:667-683. [PMID: 32216704 DOI: 10.1148/rg.2020190158] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Endoscopic US-guided biliary drainage (BD) is performed for various types of biliary obstruction and is mainly indicated for unsuccessful conventional transpapillary endoscopic retrograde cholangiodrainage. In endoscopic US BD, an extra-anatomic drainage route between the gastrointestinal (GI) tract and the biliary system is created with a covered metallic stent or plastic stent. Procedural types of endoscopic US BD include hepaticogastrostomy, hepaticojejunostomy (after gastrectomy), choledochoduodenostomy, hepaticoduodenostomy, and endoscopic US-guided gallbladder drainage. The technical and clinical success rates of endoscopic US BD are reported to be 94%-97% and 88%-100%, respectively. CT is crucial both in preprocedural assessment and postprocedural monitoring. CT is used to determine the indications for endoscopic US BD, which include the type of biliary obstruction, collateral vessels in the puncture route, ascites, the volume of the liver segment, the distribution of an intrahepatic tumor, and GI tract patency. After endoscopic US BD, common subclinical findings are a small amount of intraperitoneal gas, localized edematous change in the GI tract, a notch in the placed stent, and localized biliary dilatation caused by stent placement. Stent malfunction after endoscopic US BD is caused by impaction of debris and/or food, stent migration into the GI tract, or tumor overgrowth and/or hyperplasia. Complications that can occur include internal stent migration, intraperitoneal biloma, arterial bleeding or pseudoaneurysm, perforation of the GI tract, and portobiliary fistula. The incidence of clinical endoscopic US BD-related complications is 11%-23%. ©RSNA, 2020.
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Affiliation(s)
- Shunsuke Sugawara
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Miyuki Sone
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Shinichi Morita
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Susumu Hijioka
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Yasunari Sakamoto
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Masahiko Kusumoto
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
| | - Yasuaki Arai
- Department of Diagnostic Radiology (S.S., M.S., M.K., Y.A.) and Department of Hepatobiliary and Pancreatic Oncology (S.H., Y.S.), National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; and Department of Gastroenterology and Hepatology, Uonuma Institute of Community Medicine, Niigata University Hospital, Minamiuonuma, Niigata, Japan (S.M.)
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Tomimaru Y, Tanaka K, Noguchi K, Noura SO, Imamura H, Iwazawa T, Dono K. Significance of fistulography findings to the healing time of postoperative pancreatic fistula after pancreaticoduodenectomy. Surg Today 2019; 50:577-584. [PMID: 31797127 DOI: 10.1007/s00595-019-01932-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 11/07/2019] [Indexed: 01/08/2023]
Abstract
PURPOSE Pancreatic fistula (PF) is a common and serious complications after pancreaticoduodenectomy (PD). However, few studies have discussed the time required for PF healing in patients with this complication. This study investigates the PF healing time (PF-HT) and its association with findings of postoperative fistulography performed via the drainage tubes. METHODS The subjects of this study were 35 patients with PF among a total of 144 patients who underwent PD for periampullary diseases in our hospital. PF-HT, which was defined as the duration from the first postoperative fistulography to removal of the drainage tubes, was assessed in the enrolled patients. Fistulography findings were classified into four types based on fluid collection and communication with the jejunal loop. We investigated the factors affecting the PF-HT, including the fistulography findings. RESULTS The average PF-HT was 22 ± 20 days. Multivariate analysis revealed that the fistulography type was the only independent factor that affected PF-HT significantly. The PF-HT was significantly shorter in patients without fluid collection than in those with fluid collection. Moreover, those patients with fluid collection and a communication had a significantly shorter PF-HT than those without a communication. CONCLUSIONS We found that fistulography findings were significantly associated with the PF-HT. This suggests that fistulography findings could help to predict the time needed for PF healing.
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Affiliation(s)
- Yoshito Tomimaru
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan.
| | - Kaishu Tanaka
- Department of Radiology, Toyonaka Municipal Hospital, Toyonaka, Japan
| | - Kozo Noguchi
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan
| | - Shing O Noura
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan
| | - Hiroshi Imamura
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan
| | - Takashi Iwazawa
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan
| | - Keizo Dono
- Department of Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara, Toyonaka, Osaka, 560-8565, Japan
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Morita S, Kamimura K, Suda T, Oda C, Hoshi T, Kanefuji T, Yagi K, Terai S. Endoscopic ultrasound-guided transmural drainage for subphrenic abscess: report of two cases and a literature review. BMC Gastroenterol 2018; 18:55. [PMID: 29699494 PMCID: PMC5921389 DOI: 10.1186/s12876-018-0782-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 04/17/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND An intra-abdominal abscess can sometimes become serious and difficult to treat. The current standard treatment strategy for intra-abdominal abscess is percutaneous imaging-guided drainage. However, in cases of subphrenic abscess, it is important to avoid passing the drainage route through the thoracic cavity, as this can lead to respiratory complications. The spread of intervention techniques involving endoscopic ultrasonography (EUS) has made it possible to perform drainage via the transmural route. CASE PRESENTATION We describe two cases of subphrenic abscess that occurred after intra-abdominal surgery. Both were treated successfully by EUS-guided transmural drainage (EUS-TD) without severe complications. Our experience of these cases and a review of the literature suggest that the drainage catheters should be placed both internally and externally together into the abscess cavity. In previous cases there were no adverse events except for one case of mediastinitis and pneumothorax resulting from transesophageal drainage. Therefore, we consider that the transesophageal route should be avoided if possible. CONCLUSIONS Although further studies are necessary, our present two cases and a literature review suggest that EUS-TD is feasible and effective for subphrenic abscess, and not inferior to other treatments. We anticipate that this report will be of help to physicians when considering the drainage procedure for this condition. As there have been no comparative studies to date, a prospective study involving a large number of patients will be necessary to determine the therapeutic options for such cases.
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Affiliation(s)
- Shinichi Morita
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Kenya Kamimura
- 0000 0001 0671 5144grid.260975.fDivision of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachido-ri, Chuo-ku, Niigata 951-8510 Japan
| | - Takeshi Suda
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Chiyumi Oda
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Takahiro Hoshi
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Tsutomu Kanefuji
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Kazuyoshi Yagi
- 0000 0004 0639 8670grid.412181.fDepartment of Gastroenterology and Hepatology, Uonuma institute of Community Medicine Niigata University Hospital, 4132 Urasa, Minamiuonuma City, Niigata 949-7302 Japan
| | - Shuji Terai
- 0000 0001 0671 5144grid.260975.fDivision of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachido-ri, Chuo-ku, Niigata 951-8510 Japan
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