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Endoscopic Ultrasound-Guided Biliary Drainage for Unresectable Hilar Malignant Biliary Obstruction
Yousuke Nakai,Hirofumi Kogure,Hiroyuki Isayama,Kazuhiko Koike 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.3
Endoscopic transpapillary biliary drainage is the current standard of care for unresectable hilar malignant biliary obstruction (MBO)and bilateral metal stent placement is shown to have longer patency. However, technical and clinical failure is possible and percutaneoustranshepatic biliary drainage (PTBD) is sometimes necessary. Endoscopic ultrasound-guided biliary drainage (EUS-BD) is increasinglybeing reported as an alternative rescue procedure to PTBD. EUS-BD has a potential advantage of not traversing the biliary strictureand internal drainage can be completed in a single session. Some approaches to bilateral biliary drainage for hilar MBO under EUSguidanceinclude a bridging method, hepaticoduodenostomy, and a combination of EUS-BD and transpapillary biliary drainage. Theaim of this review is to summarize data on EUS-BD for hilar MBO and to clarify its advantages over the conventional approaches suchas endoscopic transpapillary biliary drainage and PTBD.
Usefulness of stent placement above the papilla, so-called, ‘inside stent’
Tanyaporn Chantarojanasiri,Hirofumi Kogure,Tsuyoshi Hamada,Hiroyuki Isayama 소화기인터벤션의학회 2018 International journal of gastrointestinal interven Vol.7 No.2
Stent occlusion and cholangitis are common complications after endoscopic biliary stenting caused by duodenobiliary refluxes and food impaction. To prolong the stent patency, the concept of stenting above the papilla, so-called inside stent, has been developed. Various studies of the inside stent in the treatment of both benign and malignant biliary obstruction have been published, with a promising result. However, most studies were retrospective, with wide variation of stent type and the etiology of biliary obstruction. This review aims to summarize the principle, evidence, and the usefulness of inside biliary stent.
Usefulness of stent placement above the papilla, so-called, ‘inside stent’
Tanyaporn Chantarojanasiri,Hirofumi Kogure,Tsuyoshi Hamada,Hiroyuki Isayama 소화기인터벤션의학회 2018 Gastrointestinal Intervention Vol.7 No.2
Stent occlusion and cholangitis are common complications after endoscopic biliary stenting caused by duodenobiliary refluxes and food impaction. To prolong the stent patency, the concept of stenting above the papilla, so-called inside stent, has been developed. Various studies of the inside stent in the treatment of both benign and malignant biliary obstruction have been published, with a promising result. However, most studies were retrospective, with wide variation of stent type and the etiology of biliary obstruction. This review aims to summarize the principle, evidence, and the usefulness of inside biliary stent.
Current Status of Endoscopic Ultrasound Techniques for Pancreatic Neoplsms
Yousuke Nakai,Naminatsu Takahara,Suguru Mizuno,Hirofumi Kogure,Kazuhiko Koike 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.6
Endoscopic ultrasound (EUS) now plays an important role in the management of pancreatic neoplasms. There are various types of pancreatic neoplasms, from benign to malignant lesions, and the role of EUS ranges from the imaging diagnosis to treatment. EUS is useful for the detection, characterization, and tissue acquisition of pancreatic lesions. Recent advancement of contrast-enhanced harmonic EUS and elastography enables better characterization of pancreatic lesions. In addition to these enhanced EUS imagingtechniques, EUS-guided tissue acquisition is now the standard procedure to establish the pathological diagnosis of pancreatic neoplasms. While these diagnostic roles of EUS have been established, EUS-guided interventions such as ablation and drainage are also increasingly utilized in the management of pancreatic neoplasms. However, most of these EUS-guided interventions are not yet standardized in terms of techniques and devices and thus need further investigations.
( Hiroyuki Isayama ),( Kazumichi Kawakubo ),( Yousuke Nakai ),( Kouta Inoue ),( Chimyon Gon ),( Saburo Matsubara ),( Hirofumi Kogure ),( Yukiko Ito ),( Takeshi Tsujino ),( Suguru Mizuno ),( Tsuyoshi H The Editorial Office of Gut and Liver 2013 Gut and Liver Vol.7 No.6
Background/Aims: Stent migration occurs frequently, but the prevention of complications resulting from covered self-expandable metal stents (C-SEMSs) remains unresolved. We prospectively assessed a newly developed C-SEMS, a modi-fied covered Zeo stent (m-CZS), in terms of its antimigration effect. Methods: Between February 2010 and January 2011, an m-CZS was inserted into 42 patients (31 initial drainage cases and 11 reintervention cases) at a tertiary referral center and three affiliated hospitals. The laser-cut stent was flared for 1.5 cm at both ends, with a 1 cm raised bank located 1 cm in from each flared end. The main outcome of this study was the rate of stent migration, and second-ary outcomes were the rate of recurrent biliary obstruction (RBO), the time to RBO, the frequencies of complications, and overall survival. Results: Of the 31 patients with initial drainage, stent migration occurred in four (12.9%, 95% con-fidence interval, 5.1% to 29.0%), with a mean time of 131 days. RBO occurred in 18 (58%), with a median time to RBO of 107 days. Following previous C-SEMS migration, seven of 10 patients (70%) did not experience m-CZS migration until death. Conclusions: m-CZSs with antimigration properties ef-fectively, although not completely, prevented stent migration after stent insertion. (Gut Liver 2013;7:725-730)
( Kazumichi Kawakubo ),( Hiroyuki Isayama ),( Yousuke Nakai ),( Naoki Sasahira ),( Hirofumi Kogure ),( Takashi Sasaki ),( Kenji Hirano ),( Minoru Tada ),( Kazuhiko Koike ) The Editorial Office of Gut and Liver 2012 Gut and Liver Vol.6 No.3
Patients with pancreatic cancer frequently suffer from both biliary and duodenal obstruction. For such patients, both bili-ary and duodenal self-expandable metal stent placement is necessary to palliate their symptoms, but it was difficult to cross two metal stents. Recently, endoscopic ultrasonogra-phy-guided choledochoduodenostomy (EUS-CDS) was report-ed to be effective for patients with an inaccessible papilla. We report two cases of pancreatic cancer with both biliary and duodenal obstructions treated successfully with simul-taneous duodenal metal stent placement and EUS-CDS. The first case was a 74-year-old man with pancreatic cancer. Duodenoscopy revealed that papilla had been invaded with tumor and duodenography showed severe stenosis in the horizontal portion. After a duodenal uncovered metal stent was placed across the duodenal stricture, EUS-CDS was per-formed. The second case was a 63-year-old man who previ-ously had a covered metal stent placed for malignant biliary obstruction. After removing the previously placed metal stent, EUS-CDS was performed. Then, a duodenal covered metal stent was placed across the duodenal stenosis. Both patients could tolerate a regular diet and did not suffer from stent occlusion. EUS-CDS combined with duodenal metal stent placement may be an ideal treatment strategy in pa-tients with pancreatic cancer with both duodenal and biliary malignant obstruction. (Gut Liver 2012;6:399-402)
Yousuke Nakai,Tatsuya Sato,Ryunosuke Hakuta,Kazunaga Ishigaki,Kei Saito,Tomotaka Saito,Naminatsu Takahara,Tsuyoshi Hamada,Suguru Mizuno,Hirofumi Kogure,Minoru Tada,Hiroyuki Isayama,Kazuhiko Koike 거트앤리버 소화기연관학회협의회 2020 Gut and Liver Vol.14 No.3
Endoscopic management of bile duct stones is now the standard of care, but challenges remain with difficult bile duct stones. There are some known factors associated with technically difficult bile duct stones, such as large size and surgically altered anatomy. Endoscopic mechanical lithotripsy is now the standard technique used to remove large bile duct stones, but the efficacy of endoscopic papillary large balloon dilatation (EPLBD) and cholangioscopy with intraductal lithotripsy has been increasingly reported. In patients with surgically altered anatomy, biliary access before stone removal can be technically difficult. Endotherapy using two new endoscopes is now utilized in clinical practice: enteroscopy-assisted endoscopic retrograde cholangiopancreatography and endoscopic ultrasound-guided antegrade treatment. These new approaches can be combined with EPLBD and/or cholangioscopy to remove large bile duct stones from patients with surgically altered anatomy. Since various endoscopic procedures are now available, endoscopists should learn the indications, advantages and disadvantages of each technique for better management of bile duct stones.
A Meta-Analysis of Slow Pull versus Suction for Endoscopic Ultrasound-Guided Tissue Acquisition
( Yousuke Nakai ),( Tsuyoshi Hamada ),( Ryunosuke Hakuta ),( Tatsuya Sato ),( Kazunaga Ishigaki ),( Kei Saito ),( Tomotaka Saito ),( Naminatsu Takahara ),( Suguru Mizuno ),( Hirofumi Kogure ),( Kazuhi 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2021 Gut and Liver Vol.15 No.4
Background/Aims: Endoscopic ultrasound (EUS)-guided tissue acquisition is widely utilized as a diagnostic modality for intra-abdominal masses, but there remains debate regarding which suction technique, slow pull (SP) or conventional suction (CS), is better. A meta-analysis of reported studies was conducted to compare the diagnostic yields of SP and CS during EUS-guided tissue acquisition. Methods: We conducted a systematic electronic search using MEDLINE/PubMed, Web of Science, and the Cochrane Central Register of Controlled Trials to identify clinical studies comparing SP and CS. We meta-analyzed accuracy, sensitivity, blood contamination and cellularity using the random-effects model. Results: A total of 17 studies (seven randomized controlled trials, four prospective studies, and six retrospective studies) with 1,616 cases were included in the analysis. Compared to CS, there was a trend toward better accuracy (odds ratio [OR], 1.48; 95% confidence interval [CI], 0.97 to 2.27; p=0.07) and sensitivity (OR, 1.67; 95% CI, 0.95 to 2.93; p=0.08) with SP and a significantly lower rate of blood contamination (OR, 0.48; 95% CI, 0.33 to 0.69; p<0.01). However, there was no significant difference in cellularity between SP and CS, with an OR of 1.28 (95% CI, 0.68 to 2.40; p=0.45). When the use of a 25-gauge needle was analyzed, the accuracy and sensitivity of SP were significantly better than those of CS, with ORs of 4.81 (95% CI, 1.99 to 11.62; p<0.01) and 4.69 (95% CI, 1.93 to 11.40; p<0.01), respectively. Conclusions: Compared to CS, SP appears to provide better accuracy and sensitivity in EUSguided tissue acquisition, especially when a 25-gauge needle is used. (Gut Liver 2021;15:625- 633)
( Naminatsu Takahara ),( Hiroyuki Isayama ),( Yousuke Nakai ),( Shuntaro Yoshida ),( Tomotaka Saito ),( Suguru Mizuno ),( Hiroshi Yagioka ),( Hirofumi Kogure ),( Osamu Togawa ),( Saburo Matsubara ),( 대한간학회 2017 Gut and Liver Vol.11 No.4
Background/Aims: Endoscopic placement of self-expandable metal stents (SEMSs) has emerged as a palliative treatment for malignant gastric outlet obstruction (GOO). Although covered SEMSs can prevent tumor ingrowth, frequent migration of covered SEMSs may offset their advantages in preventing tumor ingrowth. Methods: We conducted this multicenter, single-arm, retrospective study at six tertiary referral centers to evaluate the safety and efficacy of a partially covered SEMS with an uncovered large-bore flare at the proximal end as an antimigration system in 41 patients with symptomatic malignant GOO. The primary outcome was clinical success, and the secondary outcomes were technical success, stent dysfunction, adverse events, and survival after stent placement. Results: The technical and clinical success rates were 100% and 95%, respectively. Stent dysfunctions occurred in 17 patients (41%), including stent migration in nine (23%), tumor ingrowth in one (2%), and tumor overgrowth in four (10%). Two patients (5%) developed adverse events: one pancreatitis and one perforation. No procedurerelated death was observed. Conclusions: A novel partially covered SEMS with a large-bore flare proximal end was safe and effective for malignant GOO but failed to prevent stent migration. Further research is warranted to develop a covered SEMS with an optimal antimigration system. (Gut Liver 2017;11:481-488)
Groove Pancreatitis: Endoscopic Treatment via the Minor Papilla and Duct of Santorini Morphology
Tanyaporn Chantarojanasiri,Hiroyuki Isayama,Yousuke Nakai,Saburo Matsubara,Natsuyo Yamamoto,Naminatsu Takahara,Suguru Mizuno,Tsuyoshi Hamada,Hirofumi Kogure,Kazuhiko Koike 거트앤리버 소화기연관학회협의회 2018 Gut and Liver Vol.12 No.2
Background/Aims: Groove pancreatitis (GP) is an uncommon disease involving the pancreaticoduodenal area. Possible pathogenesis includes obstructive pancreatitis in the duct of Santorini and impaired communication with the duct of Wirsung, minor papilla stenosis, and leakage causing inflammation. Limited data regarding endoscopic treatment have been published. Methods: Seven patients with GP receiving endoscopic treatment were reviewed. The morphology of the pancreatic duct was evaluated by a pancreatogram. Endoscopic dilation of the minor papilla and drainage of the duct of Santorini were performed. Results: There were two pancreatic divisum cases, one ansa pancreatica case and four impaired connections between the duct of Santorini and the main pancreatic duct. Three to 31 sessions of endoscopy, with 2 to 24 sessions of transpapillary stenting and dilation, were performed. Interventions through the minor papilla were successfully performed in six of seven cases. The pancreatic stenting duration ranged from 2 to 87 months. Five patients with evidence of chronic pancreatitis (CP) tended to receive more endoscopic interventions than did the two patients without CP (2–24 vs 2, respectively) for GP and other complications associated with CP. Conclusions: Disconnection or impairment of communication between the ducts of Santorini and Wirsung was observed in all cases of GP. No surgery was required, and endoscopic minor papilla dilation and drainage of the duct of Santorini were feasible for the treatment of GP.