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Digital Single-operator Cholangioscopy (DSOC) Improves Interobserver Agreement (IOA) and Accuracy for Evaluation of Indeterminate Biliary Strictures: The Monaco Classification. J Clin Gastroenterol 2022; 56:e94-e97. [PMID: 32040050 DOI: 10.1097/mcg.0000000000001321] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 01/03/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Visual characteristics seen during digital single-operator cholangioscopy (DSOC) have not been validated. The aim of this 2-phase study was to define terminology by consensus for the visual diagnosis of biliary lesions to develop a model for optimization of the diagnostic performance of DSOC. MATERIALS AND METHODS In phase 1 (criteria identification), video-cholangioscopy clips were reviewed by 12 expert biliary endoscopists, who were blinded to the final diagnosis. Visual criteria were consolidated into the following categories: (1) stricture, (2) lesion, (3) mucosal features, (4) papillary projections, (5) ulceration, (6) abnormal vessels, (7) scarring, (8) pronounced pit pattern.During the second phase (validation), 14 expert endoscopists reviewed DSOC (SpyGlass DS, Boston Scientific) clips using the 8 criteria to assess interobserver agreement (IOA) rate. RESULTS In phase 1, consensus for visual findings were categorized into 8 criteria titled the "Monaco Classification." The frequency of criteria were: (1) presence of stricture-75%, (2) presence of lesion type-55%, (3) mucosal features-55%, (4) papillary projections-45%, (5) ulceration-42.5%, (6) abnormal vessels-10%, (7) scarring-40%, and (8) pronounced pit pattern-10%. The accuracy on final diagnosis based on visual impression alone was 70%.In phase 2, the IOA rate using Monaco Classification criteria ranged from slight to fair. The presumptive diagnosis IOA was fair (κ=0.31, SE=0.02), and overall diagnostic accuracy was 70%. CONCLUSIONS The Monaco classification identifies 8 visual criteria for biliary lesions on single-operator digital cholangioscopy. Using the criteria, the IOA and diagnostic accuracy rate of DSOC is improved compared with prior studies.
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Lee WM, Moon JH, Lee YN, Shin IS, Lee TH, Yang JK, Cha SW, Cho YD, Park SH. Utility of Direct Peroral Cholangioscopy Using a Multibending Ultraslim Endoscope for Difficult Common Bile Duct Stones. Gut Liver 2022; 16:599-605. [PMID: 35000935 PMCID: PMC9289834 DOI: 10.5009/gnl210355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/13/2021] [Accepted: 09/24/2021] [Indexed: 11/04/2022] Open
Abstract
Background/Aims Treatment options for difficult bile duct stones are limited. Direct peroral cholangioscopy (POC)-guided lithotripsy may be an option. A newly developed multibending (MB) ultraslim endoscope has several structural features optimized for direct POC. We evaluated the utility of direct POC using an MB ultraslim endoscope for lithotripsy in patients with difficult bile duct stones. Methods Twenty patients with difficult bile duct stones, in whom stone removal using conventional endoscopic methods, including mechanical lithotripsy, had failed were enrolled from March 2018 to August 2019. Direct POC-guided lithotripsy was performed by electrohydraulic lithotripsy or laser lithotripsy. The primary outcome was complete ductal clearance, defined as the retrieval of all bile duct stones after lithotripsy confirmed by balloon-occluded cholangiography and/or direct POC. Results The technical success rate of direct POC was 100% (20/20), and the free-hand insertion rate was 95% (19/20). Direct POC-guided lithotripsy, attempted by electrohydraulic lithotripsy in nine patients (45%) and laser lithotripsy in 11 patients (55%), was successful in 95% (19/20) of the patients. Complete ductal clearance after direct POC-guided lithotripsy was achieved in 95% (19/20) of patients. Patients required a median of 2 (range, 1-3) endoscopic retrograde cholangiopancreatography sessions for complete stone removal. Adverse event was observed in one patient (5%) with hemobilia and was treated conservatively. Conclusions Direct POC using an MB ultraslim endoscope was safe and effective for lithotripsy in patients with difficult bile duct stones.
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Affiliation(s)
- Won Myung Lee
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University School of Medicine, Bucheon, Korea
| | - Jong Ho Moon
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University School of Medicine, Bucheon, Korea
| | - Yun Nah Lee
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University School of Medicine, Bucheon, Korea
| | - Il Sang Shin
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University School of Medicine, Bucheon, Korea
| | - Tae Hoon Lee
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Soonchunhyang University School of Medicine, Cheonan, Korea
| | - Jae Kook Yang
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Soonchunhyang University School of Medicine, Cheonan, Korea
| | - Sang-Woo Cha
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University School of Medicine, Seoul, Korea
| | - Young Deok Cho
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University School of Medicine, Seoul, Korea
| | - Sang-Heum Park
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Soonchunhyang University School of Medicine, Cheonan, Korea
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Use of peroral cholangioscopy to screen for neoplastic bile duct lesions in patients with bile duct stones (with videos). Gastrointest Endosc 2021; 94:776-785. [PMID: 33865838 DOI: 10.1016/j.gie.2021.03.997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 03/31/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Although cholangiocarcinomas (CCAs) can be diagnosed using several modalities, the detection of early-stage cancers remains unsatisfactory. We explored whether peroral cholangioscopy (POC) could be used to screen for neoplastic bile duct lesions including CCAs in patients with bile duct stones. METHODS Two hundred seven patients who underwent endoscopic removal of bile duct stones were enrolled between August 2010 and July 2018. The primary outcome was the detection rate of intraductal neoplastic biliary lesions by direct POC. Secondary outcomes were the technical success rates of direct POC and POC-guided forceps biopsy sampling (POC-FB), the diagnostic accuracy of the direct POC findings, adverse events, and the number needed to screen to detect a neoplastic bile duct lesion. RESULTS Direct POC was successful in 199 of 207 patients (96.1%). Mild cholangitis developed in 2 patients (1.0%) and was treated conservatively. Of the 199 successfully performed POCs, 31 patients (15.6%) exhibited abnormal intraductal mucosal lesions. The technical success rate of POC-FB was 90.3% (28/31 patients). The pathologic diagnoses after POC-FB were CCAs (n = 4), intraductal papillary neoplasms of the bile duct (IPN-B) (n = 2), an adenoma with dysplasia (n = 1), and benign lesions (n = 21). Direct POC correctly distinguished non-neoplastic from neoplastic bile duct lesions in 91.6% of patients. Curative surgical resection was performed for the 5 patients with CCAs or IPN-B. The number needed to screen to detect a neoplastic bile duct lesion was 29.6. CONCLUSIONS Direct POC using a dedicated, ultraslim upper endoscope usefully screens for neoplastic bile duct lesions including CCAs in selected patients with bile duct stones.
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Sanders DJ, Bomman S, Krishnamoorthi R, Kozarek RA. Endoscopic retrograde cholangiopancreatography: Current practice and future research. World J Gastrointest Endosc 2021; 13:260-274. [PMID: 34512875 PMCID: PMC8394185 DOI: 10.4253/wjge.v13.i8.260] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/18/2021] [Accepted: 07/09/2021] [Indexed: 02/06/2023] Open
Abstract
Endoscopic retrograde cholangiopancreatography (ERCP) has evolved from a primarily diagnostic to therapeutic procedure in hepatobiliary and pancreatic disease. Most commonly, ERCPs are performed for choledocholithiasis with or without cholangitis, but improvements in technology and technique have allowed for management of pancreatic duct stones, benign and malignant strictures, and bile and pancreatic leaks. As an example of necessity driving innovation, the new disposable duodenoscopes have been introduced into practice. With the advantage of eliminating transmissible infections, they represent a paradigm shift in quality improvement within ERCP. With procedures becoming more complicated, the necessity for anesthesia involvement and safety of propofol use and general anesthesia has become better defined. The improvements in endoscopic ultrasound (EUS) have allowed for direct bile duct access and EUS facilitated bile duct access for ERCP. In patients with surgically altered anatomy, selective cannulation can be performed with overtube-assisted enteroscopy, laparoscopic surgery assistance, or the EUS-directed transgastric ERCP. Cholangioscopy and pancreatoscopy use has become ubiquitous with defined indications for large bile duct stones, indeterminate strictures, and hepatobiliary and pancreatic neoplasia. This review summarizes the recent advances in infection prevention, quality improvement, pancreaticobiliary access, and management of hepatobiliary and pancreatic diseases. Where appropriate, future research directions are included in each section.
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Affiliation(s)
- David J Sanders
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
| | - Shivanand Bomman
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
| | - Rajesh Krishnamoorthi
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
| | - Richard A Kozarek
- Digestive Disease Institute, Virginia Mason Medical Center, Seattle, WA 98101, United States
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Fung BM, Tabibian JH. Biliary endoscopy in the management of primary sclerosing cholangitis and its complications. LIVER RESEARCH 2019; 3:106-117. [PMID: 31341699 PMCID: PMC6656407 DOI: 10.1016/j.livres.2019.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Primary sclerosing cholangitis (PSC) is a chronic, idiopathic, cholestatic liver disease characterized by inflammation and fibrosis of the intrahepatic and/or extrahepatic bile ducts. It can affect individuals of all age groups and gender, has no established pharmacotherapy, and is associated with a variety of neoplastic (e.g. cholangiocarcinoma) and non-neoplastic (e.g. dominant strictures) hepatobiliary complications. Given these considerations, endoscopy plays a major role in the care of patients with PSC. In this review, we discuss and provide updates regarding endoscopic considerations in the management of hepatobiliary manifestations and complications of PSC. Where evidence is limited, we suggest pragmatic approaches based on currently available data and expert opinion.
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Affiliation(s)
- Brian M. Fung
- University of California Los Angeles-Olive View Internal Medicine Residency Program, Sylmar, CA, USA
| | - James H. Tabibian
- Division of Gastroenterology, Department of Medicine, Olive View-University of California Los Angeles Medical Center, Sylmar, CA, USA
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Kaura T, Willingham FF, Chawla S. Role of pancreatoscopy in management of pancreatic disease: A systematic review. World J Gastrointest Endosc 2019; 11:155-167. [PMID: 30788034 PMCID: PMC6379742 DOI: 10.4253/wjge.v11.i2.155] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/30/2018] [Accepted: 01/23/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Per-oral pancreatoscopy (POP) plays a role in the diagnosis and therapy of pancreatic diseases. With recent technological advances, there has been renewed interest in this modality.
AIM To evaluate the efficacy and safety of POP in management of pancreatic stone disease and pancreatic ductal neoplasia.
METHODS To determine the safety and efficacy of POP in the management of pancreatic diseases, a systematic search was conducted in MEDLINE, EMBASE and Ovid. Articles in languages other than English and case reports were excluded. All published case series were eligible. Data specific to POP were extracted from studies, which combined cholangiopancreatoscopy. Ten studies were included in the analysis of POP therapy for pancreatic stone disease, and 15 case series satisfied the criteria for inclusion for the role of POP in the management of pancreatic ductal neoplasia. The examined data were subcategorized according to adjunctive modalities, such as direct tissue sampling, cytology, the role of intraoperative POP, intraductal ultrasound (IDUS) and POP combined with image-enhancing technology.
RESULTS The success rate for complete ductal stone clearance ranged from 37.5%-100%. Factors associated with failure included the presence of strictures, multiple stones and the inability to visualize the target area. Although direct visualization can identify malignant and premalignant conditions, there is significant overlap with benign diseases. Visually-directed biopsies provide a high degree of accuracy, and represent a unique approach for tissue acquisition in patients with ductal abnormalities. Addition of pancreatic fluid cytology increases diagnostic yield for indeterminate lesions. Protrusions larger than 3 mm noted on IDUS are significantly more likely to be associated with malignancy. The rate of adverse events associated with POP ranged from 0%-35%.
CONCLUSION Current evidence supports wider adoption of pancreatoscopy, as it is safe and effective. Improved patient selection and utilization of novel technologies may further enhance its role in managing pancreatic disease.
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Affiliation(s)
- Tarun Kaura
- Division of Gastroenterology and Hepatology, Aurora St Luke’s Medical center, University of Wisconsin School of Medicine and Public Health, Milwaukee, WI 53215, United States
| | - Field F Willingham
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, United States
| | - Saurabh Chawla
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, United States
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Ishida Y, Itoi T, Okabe Y. Types of Peroral Cholangioscopy: How to Choose the Most Suitable Type of Cholangioscopy. ACTA ACUST UNITED AC 2016; 14:210-9. [PMID: 27053226 DOI: 10.1007/s11938-016-0090-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OPINION STATEMENT A number of case studies have described the usefulness of peroral cholangioscopy for diagnosis and therapy, performed by visualizing the inner cavity of the bile duct. Currently available types of peroral cholangioscopy include peroral videocholangioscopy (POCS) using a mother-baby scope system (MBSS), direct peroral videocholangioscopy (D-POCS), and SpyGlass™ Direct Visualization System (SGDVS). POCS started with cholangioscopy using MBSS, requiring two skilled endoscopists using two endoscopic systems. On the other hand, D-POCS and SGDVS were developed as single-operator techniques. In MBSS, the videocholangioscope is inserted into the bile duct through the accessory channel of a conventional therapeutic duodenoscope. MBSS enables comparatively easy scope insertion into the bile duct and stable scope positioning. POCS using MBSS provides excellent images and can be coupled with an image-enhanced function system. However, it has a smaller accessory channel, limiting the devices that can be used. Additionally, scope fragility is serious problem. D-POCS using an ultraslim upper endoscope has been introduced to overcome the drawback of POCS using MBSS. D-POCS has a larger working channel and requires only one endoscopist. D-POCS allows a greater variety of procedures under excellent imaging even with an image-enhanced function system; however, scope insertion is still challenging. SGDVS is designed for single-operator use and is dedicated to procedural purposes. It comprises a reusable optical probe and disposable delivery catheter, which has four-way deflected steering and dedicated irrigation channels. These features lead to good maneuverability, although image quality is poor due to its optical probe system. All systems' features should be recognized and the appropriate system used depending on the need. Cholangioscopy has shown dramatic progress from diagnosis to therapy with high future growth potential.
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Affiliation(s)
- Yusuke Ishida
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - Takao Itoi
- Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan.
| | - Yoshinobu Okabe
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
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Abstract
Cholangioscopy was first performed in the 1970s. We now use the term cholangiopancreatoscopy (CP) to reflect the wider application of these miniature reusable dual-operator "mother-daughter" endoscope systems and now fully disposable and digital single-operator optical catheters for evaluating the biliary or pancreatic duct. Cholangioscopy is an established modality for the management of large biliary stones and for the diagnosis and exclusion of biliary tumors. Pancreatoscopy is increasingly being performed to treat difficult pancreatic duct stones and may be used to distinguish malignant from benign ductal pathology. This review covers available CP technologies, indications, technique, efficacy, and complications.
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Ishida Y, Itoi T, Okabe Y. Can image-enhanced cholangioscopy distinguish benign from malignant lesions in the biliary duct? Best Pract Res Clin Gastroenterol 2015; 29:611-25. [PMID: 26381306 DOI: 10.1016/j.bpg.2015.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 04/17/2015] [Accepted: 05/21/2015] [Indexed: 01/31/2023]
Abstract
A new video peroral cholangioscopy (POCS) has been developed with high-quality digital imaging, and its clinical use has been reported. Additionally, direct peroral cholangioscopy (D-POCS) using an ultraslim endoscope has been proposed recently. To improve the diagnostic yield of POCS or D-POCS, image-enhanced endoscopy has been used in combination. Chromoendoscopy with methylene blue staining (ME), autofluorescence imaging (AFI), and narrow-band imaging (NBI) has been evaluated in biliary tract diseases. Observation of the mucosal structure and vessels is reportedly important for distinguishing non-neoplasms from neoplasms. Therefore, NBI is the most promising tool among image-enhanced endoscopies as it can enhance visualization of the mucosal structure and vessels simultaneously. There are currently few reports that have evaluated the utility of POCS or D-POCS based on pathological findings. Thus, endoscopic findings of the bile duct mucosa have not yet been fully established. At present, POCS-guided biopsy should be carried out.
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Affiliation(s)
- Yusuke Ishida
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Fukuoka, Japan
| | - Takao Itoi
- Department of Gastroenterology and Hepatology, Tokyo Medical University, Japan.
| | - Yoshinobu Okabe
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Fukuoka, Japan
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Ghersi S, Fuccio L, Bassi M, Fabbri C, Cennamo V. Current status of peroral cholangioscopy in biliary tract diseases. World J Gastrointest Endosc 2015; 7:510-517. [PMID: 25992189 PMCID: PMC4436918 DOI: 10.4253/wjge.v7.i5.510] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/16/2015] [Accepted: 02/11/2015] [Indexed: 02/05/2023] Open
Abstract
Peroral cholangioscopy (POC) is an important tool for the management of a selected group of biliary diseases. Because of its direct visualization, POC allows targeted diagnostic and therapeutic procedures. POC can be performed using a dedicated cholangioscope that is advanced through the accessory channel of a duodenoscope or via the insertion of a small-diameter endoscope directly into the bile duct. POC was first described in the 1970s, but the use of earlier generation devices was substantially limited by the cumbersome equipment setup and high repair costs. For nearly ten years, several technical improvements, including the single-operator system, high-quality images, the development of dedicated accessories and the increased size of the working channel, have led to increased diagnostic accuracy, thus assisting in the differentiation of benign and malignant intraductal lesions, targeting biopsies and the precise delineation of intraductal tumor spread before surgery. Furthermore, lithotripsy of difficult bile duct stones, ablative therapies for biliary malignancies and direct biliary drainage can be performed under POC control. Recent developments of new types of conventional POCs allow feasible, safe and effective procedures at reasonable costs. In the current review, we provide an updated overview of POC, focusing our attention on the main current clinical applications and on areas for future research.
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Moura EGHD, Franzini T, Moura RN, Carneiro FOAA, Artifon ELDA, Sakai P. Cholangioscopy in bile duct disease: a case series. ARQUIVOS DE GASTROENTEROLOGIA 2015; 51:250-4. [PMID: 25296087 DOI: 10.1590/s0004-28032014000300015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 03/25/2014] [Indexed: 02/06/2023]
Abstract
CONTEXT Direct endoscopic visualization of biliopancreatic duct is certainly one of the greatest advances of therapeutic endoscopy. The use of a single-operator cholangioscopy platform (SpyGlass) is a promising technique in the evaluation of diseases such as indeterminate biliary stricture and giant choledocholitiasis. This is the first Brazilian case series using this technology. METHODS We report a case series of 20 patients in whom SpyGlass was used with diagnostic and therapeutic intention. RESULTS Most patients were female (60%) and the median age was 48 years (ranging from 14 to 94). Choledocholitiasis was the most common indication (12/20), and electrohydraulic lithotripsy was applied in eight (66%). Electrohydraulic lithotripsy was successful in seven (87.5%) patients. Partial stone fragmentation occurred in one patient with large stone causing stone-choledochal disproportion, which was conducted with biliary plastic stent placement and a second scheduled endoscopic approach in 3 months. In cases of undefined etiology of biliary strictures, it was possible to exclude malignancy due to direct visualization (7/8) or biopsy (1/8). One complication occurred (duodenal perforation) after papillary balloon dilation. CONCLUSION The use of SpyGlass demonstrated the benefits, especially in cases of large bile duct stones and indeterminate biliary strictures. Other potencial improvements such as reduction on radiation exposure should be confirmed in prospective studies.
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Affiliation(s)
| | - Tomazo Franzini
- Departamento de Gastroenterologia, Serviço de Endoscopia Gastrointestinal, Universidade de São Paulo, São Paulo, SP, Brasil
| | - Renata Nobre Moura
- Departamento de Gastroenterologia, Serviço de Endoscopia Gastrointestinal, Universidade de São Paulo, São Paulo, SP, Brasil
| | | | | | - Paulo Sakai
- Departamento de Gastroenterologia, Serviço de Endoscopia Gastrointestinal, Universidade de São Paulo, São Paulo, SP, Brasil
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Abstract
Since its introduction, cholangioscopy has been used diagnostically and therapeutically. The working channel size has increased, permitting direct visualization for tissue sampling and to guide application of lithotripsy for difficult stones. Cholangioscopy utilizes endoscope and catheter-based systems. The application of slim gastroscopes for direct cholangioscopy provides better image resolution than conventional systems. Cholangioscopy has proven effective in the management of large biliary stones and for the diagnosis and exclusion of biliary tumors. Commercially available cholangioscopes are fiberoptic; those with digital video technology remain in a prototype development phase. This review covers available cholangioscope technologies, indications, technique, efficacy, and complications.
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Affiliation(s)
- Brian C Brauer
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, 1635 Aurora Court, Mailstop F-735, Room 2.031, Aurora, CO 80045, USA.
| | - Raj J Shah
- Division of Gastroenterology and Hepatology, University of Colorado Anschutz Medical Campus, 1635 Aurora Court, Mailstop F-735, Room 2.031, Aurora, CO 80045, USA
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13
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Nguyen NQ, Schoeman MN, Ruszkiewicz A. Clinical utility of EUS before cholangioscopy in the evaluation of difficult biliary strictures. Gastrointest Endosc 2013; 78:868-874. [PMID: 23800700 DOI: 10.1016/j.gie.2013.05.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 05/13/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND Biliary tract malignancies can be assessed with either EUS or SpyGlass cholangioscopy (SGC). OBJECTIVE To evaluate the impact of EUS and guided biopsy before considering SGC in patients who had biliary strictures with negative ductal brushing. DESIGN Prospective, observational study. SETTING Tertiary level referral hospital. PATIENTS Forty consecutive patients with biliary strictures. INTERVENTION EUS evaluation and biopsy, where possible, were performed in all patients. If EUS examination failed to provide a definitive diagnosis, SGC and ductal biopsy was performed. Results were compared with surgical specimens or positive histocytology. MAIN OUTCOME MEASUREMENTS Tissue diagnosis, technical success, adverse events, and clinical outcomes. RESULTS On EUS, abnormalities responsible for the biliary strictures were identified in 39 patients (98%), with FNA achievable in 30 patients (75%). EUS-FNA provided positive histocytology in 23 patients (58%). SGC-guided biopsy was performed to evaluate nondiagnostic EUS-FNA (17 patients) and to clarify autoimmune pancreatitis on FNA (2 patients). The procedure was successful in 18 patients (95%) and provided tissue diagnosis in 16 patients (88%), with 2 false-negative results from extrinsic pathologies. When EUS was used before the SGC approach, the need for SGC was avoided in 24 patients (60%), cholangitis was minimized in 2.5%, and a cost saving of U.S.$110,000 was realized. Tissue diagnosis was achieved in 38 patients (94%) with this approach. LIMITATIONS Relatively small sample size. CONCLUSIONS EUS evaluation in patients with difficult biliary stricture prevents the need, cost, and adverse events of SGC in 60% of patients. Together, EUS followed by the SGC approach provides correct clinical diagnosis in 94% of patients with minimal adverse events.
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Affiliation(s)
- Nam Q Nguyen
- Department of Gastroenterology & Hepatology, Royal Adelaide Hospital, Adelaide, South Australia; Department of Medicine, University of Adelaide, Adelaide, South Australia
| | - Mark N Schoeman
- Department of Gastroenterology & Hepatology, Royal Adelaide Hospital, Adelaide, South Australia
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Pohl J, Meves VC, Mayer G, Behrens A, Frimberger E, Ell C. Prospective randomized comparison of short-access mother-baby cholangioscopy versus direct cholangioscopy with ultraslim gastroscopes. Gastrointest Endosc 2013; 78:609-16. [PMID: 23680176 DOI: 10.1016/j.gie.2013.04.177] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 04/15/2013] [Indexed: 12/18/2022]
Abstract
BACKGROUND Mother-baby technologies, the criterion standard for cholangioscopy, have several limitations. A novel, short-access, mother-baby (SAMBA) system may improve this technique. Direct cholangioscopy (DC) was recently developed as an alternative to mother-baby cholangioscopy. OBJECTIVE Comparison of success rates with SAMBA and DC. DESIGN Single-center, randomized, controlled trial. SETTING Academic tertiary-care referral center. PATIENTS Sixty patients with suspected cholangiopathies randomized to either SAMBA (n = 30) or DC (n = 30). INTERVENTION Cholangioscopy under deep sedation. MAIN OUTCOME MEASUREMENTS Technical success rate of diagnostic or therapeutic procedure. RESULTS A total of 24 and 21 diagnostic procedures were performed in the SAMBA and DC groups, respectively. There were no significant differences in the overall technical success rates between SAMBA (90.0%) and DC (86.7%) (P = 1.0). There was better correlation between the endoscopic prediction and histologic findings in DC (P = .013). Procedure times were shorter in DC (P < .03). In patients without significant stenoses, SAMBA allowed intrahepatic bile duct exploration in all cases, compared with 10.5% of cases in DC (P < .01). No differences regarding adverse event rates between the groups occurred (10.0% both groups). LIMITATIONS Small sample size. Heterogeneous indications for cholangioscopy. DC requires advanced skills of the endoscopist. The study is not replicable. CONCLUSION SAMBA and DC offer high technical success rates for diagnostic and therapeutic interventions. The advantages of DC consist of superior imaging, shorter total procedure time, and a wider working channel for adequate tissue sampling. SAMBA is better than DC with regard to intraductal stability and accessibility of the intrahepatic bile ducts.
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Affiliation(s)
- Juergen Pohl
- Department of Internal Medicine II, Dr Horst Schmidt Klinik, (Medical School of the University of Mainz), Wiesbaden, Germany
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Abstract
PURPOSE OF REVIEW Endoscopists have long awaited advances in the equipment and techniques for cholangiopancreatoscopy. Since the turn of the millennium, endoscopists have witnessed an explosion in the development and refinement of the capabilities of cholangioscopes as they move from being almost exclusive to tertiary care academic settings to a wider range of practices. RECENT FINDINGS Studies have tested and constructively critiqued the procedure, hoping to increase the success rate of diagnostic and therapeutic interventions. Many have found significant improvement upon the limitations of radiographic imaging in diagnosing diseases and achieving full clearance of biliary stones. Image quality has improved with a range of features. However, most of these still need to be studied further. The addition of balloon catheters and overtubes has improved stability and access to the biliary ducts, but comes with complications that need to be studied further. SUMMARY Although we still have improvements to yearn for, the future looks bright. As endoscopists continue their commitment to the promise of direct visualization of the biliary trees and the complementary tools for diagnosis and treatment, we are continuing to raise quality of care for patients with complicated biliary diseases.
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Huang SW, Lin CH, Lee MS, Tsou YK, Sung KF. Residual common bile duct stones on direct peroral cholangioscopy using ultraslim endoscope. World J Gastroenterol 2013; 19:4966-4972. [PMID: 23946602 PMCID: PMC3740427 DOI: 10.3748/wjg.v19.i30.4966] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 05/16/2013] [Accepted: 06/20/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To detect and manage residual common bile duct (CBD) stones using ultraslim endoscopic peroral cholangioscopy (POC) after a negative balloon-occluded cholangiography.
METHODS: From March 2011 to December 2011, a cohort of 22 patients with CBD stones who underwent both endoscopic retrograde cholangiography (ERC) and direct POC were prospectively enrolled in this study. Those patients who were younger than 20 years of age, pregnant, critically ill, or unable to provide informed consent for direct POC, as well as those with concomitant gallbladder stones or CBD with diameters less than 10 mm were excluded. Direct POC using an ultraslim endoscope with an overtube balloon-assisted technique was carried out immediately after a negative balloon-occluded cholangiography was obtained.
RESULTS: The ultraslim endoscope was able to be advanced to the hepatic hilum or the intrahepatic bile duct (IHD) in 8 patients (36.4%), to the extrahepatic bile duct where the hilum could be visualized in 10 patients (45.5%), and to the distal CBD where the hilum could not be visualized in 4 patients (18.2%). The procedure time of the diagnostic POC was 8.2 ± 2.9 min (range, 5-18 min). Residual CBD stones were found in 5 (22.7%) of the patients. There was one residual stone each in 3 of the patients, three in 1 patient, and more than five in 1 patient. The diameter of the residual stones ranged from 2-5 mm. In 2 of the patients, the residual stones were successfully extracted using either a retrieval balloon catheter (n = 1) or a basket catheter (n = 1) under direct endoscopic control. In the remaining 3 patients, the residual stones were removed using an irrigation and suction method under direct endoscopic visualization. There were no serious procedure-related complications, such as bleeding, pancreatitis, biliary tract infection, or perforation, in this study.
CONCLUSION: Direct POC using an ultraslim endoscope appears to be a useful tool for both detecting and treating residual CBD stones after conventional ERC.
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Gabbert C, Warndorf M, Easler J, Chennat J. Advanced techniques for endoscopic biliary imaging: cholangioscopy, endoscopic ultrasonography, confocal, and beyond. Gastrointest Endosc Clin N Am 2013; 23:625-46. [PMID: 23735107 DOI: 10.1016/j.giec.2013.03.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Cholangioscopy, endosonography, and confocal microscopy represent important technologies that expand biliary imaging beyond a level previously realized by noninvasive modalities (ultrasonography, computed tomography, and magnetic resonance cholangiopancreatography) and endoscopic retrograde cholangiopancreatography. Endoscopic ultrasonography has shown efficacy for the evaluation of indeterminate biliary strictures; however, this modality seems most reliable for distal bile duct abnormalities and in the setting of a moderate to high pretest probability for malignancy. Further refinement of these technologies, validation of their respective diagnostic criteria, and study within the context of comparative, randomized trials are needed and will contribute greatly to expedient patient care.
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Affiliation(s)
- Charles Gabbert
- Division of Gastroenterology, Hepatology, & Nutrition, University of Pittsburgh Medical Center, 200 Lothrop Street, C Wing, Mezzanine Level, Pittsburgh, PA 15213, USA
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Abstract
Miniature endoscopes that can be introduced into the bile duct through the duodenoscope during endoscopic retrograde cholangiopancreatography were developed to allow nonsurgical management of difficult biliary stones. The direct visualization enabled by these cholangioscopes of the biliary epithelium provides additional data in the assessment of biliary strictures. Cholangioscopy allows assessment of the biliary lumen, biliary epithelium, targeted tissue acquisition, targeted therapy, and wire guidance.
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Affiliation(s)
- Isaac Raijman
- Digestive Associates of Houston, Houston, TX 77030, USA.
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Moon JH, Terheggen G, Choi HJ, Neuhaus H. Peroral cholangioscopy: diagnostic and therapeutic applications. Gastroenterology 2013; 144:276-282. [PMID: 23127575 DOI: 10.1053/j.gastro.2012.10.045] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 10/26/2012] [Accepted: 10/31/2012] [Indexed: 02/07/2023]
Affiliation(s)
- Jong Ho Moon
- Digestive Disease Center, Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Bucheon/Seoul, Korea
| | - Grischa Terheggen
- Department of Internal Medicine, Evangelisches Krankenhaus, Düsseldorf, Germany
| | - Hyun Jong Choi
- Digestive Disease Center, Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Bucheon/Seoul, Korea
| | - Horst Neuhaus
- Department of Internal Medicine, Evangelisches Krankenhaus, Düsseldorf, Germany.
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Williamson JB, Draganov PV. The usefulness of SpyGlass™ choledochoscopy in the diagnosis and treatment of biliary disorders. Curr Gastroenterol Rep 2012; 14:534-541. [PMID: 23065376 DOI: 10.1007/s11894-012-0287-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Peroral choledochoscopy was first described in the 1970s, but the use of earlier generation choledochoscopes was significantly limited by complex equipment setup and fragility resulting in high repair costs. In late 2006, the SpyGlass Direct Visualization System (Boston Scientific Corp, Natick, MA, USA) was introduced to the market. It is a single-operator cholangioscopy platform and improves upon many shortcomings of the dual-operator systems. Currently, the two main indications for its use are evaluation of indeterminate biliary strictures and lithotripsy for difficult-to-remove biliary stones. Recently published prospective data reconfirm that the overall success rates for adequate tissue sampling and bile duct stone clearance are around 90 %, with an acceptable safety profile. The sensitivity for detecting cancer in intrinsic biliary strictures (e.g., cholangiocarcinoma) is superior to that of standard ERCP sampling modalities, but a limited yield has been noted when sampling extrinsic malignant biliary strictures (e.g., pancreatic cancer). The two main limitations of the SpyGlass system are image quality that is impeded by the use of fiberoptic technology and a relatively small accessory channel providing passage only for dedicated miniaccessories. Nevertheless, the SpyGlass platform has made single-operator cholangioscopy feasible and refined the technique in a number of important ways. This innovation has significantly expanded our diagnostic and therapeutic ERCP armamentarium. An upgraded digital imaging version is currently in development.
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Affiliation(s)
- J B Williamson
- University of Florida College of Medicine, PO Box 100214, 1600 SW Archer Rd, Gainesville, FL 32610, USA.
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Kahaleh M. Spyglass direct visualization system. Clin Endosc 2012; 45:316-8. [PMID: 22977826 PMCID: PMC3429760 DOI: 10.5946/ce.2012.45.3.316] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 07/20/2012] [Accepted: 07/20/2012] [Indexed: 12/22/2022] Open
Abstract
Although endoscopic retrograde cholangiopancreatography is considered the gold standard to manage biliary disorders, it has its own limitations. The single-operator cholangioscopy (SOC) system (Spyglass) may offer an interesting compromise for most advanced biliary endoscopists, in terms of size (10 Fr diameter) and complexity of use. SOC is a great step toward intraductal visualization and therapy but the best is yet to come.
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Affiliation(s)
- Michel Kahaleh
- Division of Gastroenterology and Hepatology, Department of Medicine, Weill Cornell Medical College, New York, NY, USA
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23
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Holmium laser lithotripsy under direct peroral cholangioscopy by using an ultra-slim upper endoscope for patients with retained bile duct stones (with video). Gastrointest Endosc 2011; 74:1127-32. [PMID: 21963070 DOI: 10.1016/j.gie.2011.07.027] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 07/01/2011] [Indexed: 12/12/2022]
Abstract
BACKGROUND Direct peroral cholangioscopy (POC) by using an ultra-slim endoscope provides direct visualization of the bile duct and allows for therapeutic intervention. Holmium laser lithotripsy can be effective for retained bile duct stones, but it requires direct visualization during the procedure for safe and effective fragmentation. Direct POC by using an ultra-slim endoscope may facilitate holmium laser lithotripsy. OBJECTIVE To evaluate the feasibility, success rates, and complications of holmium laser lithotripsy under direct POC by using an ultra-slim endoscope for retained bile duct stones. DESIGN Observational clinical feasibility study. SETTING Tertiary-care referral center. PATIENTS This study involved 13 patients with retained bile duct stones whose treatment failed by a conventional lithotripsy method involving mechanical lithotripsy. INTERVENTION Holmium laser lithotripsy under direct POC by using an ultra-slim endoscope. MAIN OUTCOME MEASUREMENTS Success rate of complete stone removal and procedure-related complications. RESULTS Holmium laser lithotripsy under direct POC by using an ultra-slim endoscope was successful in 11 of 13 patients (84.6%). Although direct POC was successful, holmium laser lithotripsy failed in 2 patients because of inaccurate targeting of the laser fiber to stones. There were no procedure-related complications except one case of mild pancreatitis. LIMITATIONS A small number of patients and no comparison with other lithotripsy systems. CONCLUSION Holmium laser lithotripsy under direct POC by using an ultra-slim endoscope was feasible and can be a safe endoscopic management method for retained bile duct stones.
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Gaidhane M, Kahaleh M. Single-operator cholangioscopy in biliary disorders: going beyond visualization. Gastrointest Endosc 2011; 74:815-6. [PMID: 21951476 DOI: 10.1016/j.gie.2011.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 07/12/2011] [Indexed: 02/08/2023]
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Sung KF, Chu YY, Liu NJ, Hung CF, Chen TC, Chen JS, Lin CH. Direct peroral cholangioscopy and pancreatoscopy for diagnosis of a pancreatobiliary fistula caused by an intraductal papillary mucinous neoplasm of the pancreas: a case report. Dig Endosc 2011; 23:247-50. [PMID: 21699570 DOI: 10.1111/j.1443-1661.2011.01126.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Here, we report a case of a pancreatobiliary (PB) fistula caused by an intraductal papillary mucinous neoplasm (IPMN) of the pancreas. The PB fistula was suspected after endoscopic retrograde cholangiopancreatography (ERCP) and diagnosed after direct visualization with a direct peroral cholangioscopy and pancreatoscopy by using an ultra-slim endoscope. No previous reports exist on the precise diagnosis of a PB fistula with direct peroral cholangioscopy and pancreatoscopy. In our case report, a 69-year-old man underwent an ERCP because of a pancreatic head mass and biliary tract obstruction. During ERCP, a fistula between the common bile duct (CBD) and main pancreatic duct (MPD) was suspected. After endoscopic sphincterotomy, we examined both the CBD and MPD with an ultra-slim videoendoscope (GIF-N260; Olympus Optical Co, Tokyo, Japan) under direct visualization and biopsy of the mass. The analysis of the biopsy specimen confirmed this mass to be an IPMN of the pancreas. When we examined the CBD, one fistula with copious mucin secretion was identified at the distal CBD. In conclusion, direct peroral cholangioscopy and pancreatoscopy using the ultra-slim endoscope is an efficient tool for diagnosis of PB fistula and pancreatic IPMN.
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Affiliation(s)
- Kai-Feng Sung
- Department of Gastroenterology and Hepatology, Chang Gung Memorial Hospital, School of Medicine, Chang Gung University, Kwei-Shan, Taoyuan, Taiwan
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Adwan H, Pamecha V, Kalaitzakis E, Winstanley A, Grillo F, Webster G, Davidson B. Spyglass cholangioscopy in the evaluation of an intra-hepatic biliary lesion. Dig Endosc 2011; 23:199-200. [PMID: 21429032 DOI: 10.1111/j.1443-1661.2010.01076.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
MESH Headings
- Adenoma/diagnosis
- Adenoma/pathology
- Adenoma/surgery
- Aged, 80 and over
- Anastomosis, Roux-en-Y
- Bile Duct Neoplasms/diagnosis
- Bile Duct Neoplasms/pathology
- Bile Duct Neoplasms/surgery
- Bile Ducts, Intrahepatic/pathology
- Bile Ducts, Intrahepatic/surgery
- Biopsy
- Cholangiopancreatography, Endoscopic Retrograde/instrumentation
- Cholangiopancreatography, Magnetic Resonance
- Diagnosis, Differential
- Endoscopes
- Equipment Design
- Hemobilia/etiology
- Hepatectomy
- Humans
- Male
- Mucins/metabolism
- Neoplasms, Multiple Primary/diagnosis
- Neoplasms, Multiple Primary/pathology
- Neoplasms, Multiple Primary/surgery
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Choi HJ, Moon JH, Ko BM, Min SK, Song AR, Lee TH, Cheon YK, Cho YD, Park SH. Clinical feasibility of direct peroral cholangioscopy-guided photodynamic therapy for inoperable cholangiocarcinoma performed by using an ultra-slim upper endoscope (with videos). Gastrointest Endosc 2011; 73:808-13. [PMID: 21316667 DOI: 10.1016/j.gie.2010.11.049] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Accepted: 11/29/2010] [Indexed: 02/08/2023]
Abstract
BACKGROUND Photodynamic therapy (PDT) has emerged as a promising palliative treatment for inoperable cholangiocarcinoma. Cholangioscopy-guided PDT can be useful for identification of tumor margins, determination of the appropriate location for placement of the diffuser, and evaluation of the patient's response to therapy. OBJECTIVE To evaluate the feasibility of PDT under direct peroral cholangioscopy (POC) by using an ultra-slim upper endoscope in patients with inoperable cholangiocarcinoma. DESIGN Prospective, observational, pilot study. SETTING Single tertiary-care referral center. PATIENTS This study involved 9 patients with inoperable extrahepatic cholangiocarcinoma. INTERVENTION Photofrin II was administered intravenously 48 hours before PDT. Additional PDT was performed up to 48 hours after the initial application of therapy. A successful direct POC-guided PDT was defined as advancement of the endoscope into the distal margin of the tumor and maintenance of endoscope position until PDT was completed. MAIN OUTCOME MEASUREMENTS The clinical feasibility, usefulness, and complications of direct POC for PDT. RESULTS Seventeen sessions of direct POC for PDT were performed in 9 patients. PDT was performed successfully in 15 of 17 sessions (88.2%) and 7 of 9 patients (77.8%). Biliary drainage under direct POC, if necessary after PDT, was possible in 100% of patients (7/7). Follow-up direct POC confirmed significant tumor ablation after PDT in 5 patients. One patient reported mild skin redness; no major procedure-related complications were observed. LIMITATIONS Small sample size, pilot study. CONCLUSION Direct POC-guided PDT by using an ultra-slim upper endoscope seems to be both feasible and safe in select patients with inoperable extrahepatic cholangiocarcinoma.
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Affiliation(s)
- Hyun Jong Choi
- Digestive Disease Center, Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Bucheon and Seoul, Korea
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29
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Abstract
In the evaluation of biliary diseases, cholangioscopy is considered as complementary procedure to radiographic imaging. Direct visualization of the bile duct is the premier advantage of cholangioscopy over indirect imaging techniques. However, cholangioscopy has not gained wide acceptance because of several technical limitations such as scope fragility, impaired steerability, limited irrigation, and suction capabilities, as well as the need for two experienced endoscopists. Recent innovations such as the implementation of electronic video cholangioscopes and the development of single-operator systems facilitate the procedure, and promise to increase the diagnostic and therapeutic yield of cholangioscopy.
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Affiliation(s)
- Grischa Terheggen
- Department of Internal Medicine, Evangelisches Krankenhaus Düsseldorf, Kirchfeldstraße 40, 40217 Düsseldorf, Germany.
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