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Stuart Amateau

Chin Hong Lim, Cyrus Jahansouz, Martin L Freeman, Daniel B Leslie, Sayeed Ikramuddin, Stuart K Amateau
BACKGROUND: Sphincter of Oddi dysfunction (SOD) is thought to be a cause of chronic abdominal pain post Roux-en-Y gastric bypass, and current practice of performing endoscopic retrograde cholangiopancreatography (ERCP) with or without sphincterotomy is not supported by evidence. In addition to the complexity and risks of the procedure in patients with Roux-en-Y anatomy, the outcomes are uncertain and debatable. We performed a retrospective review and analysis of post-gastric bypass patients who had undergone ERCP with sphincterotomy to determine the effectiveness in patients with suspected SOD...
May 9, 2017: Obesity Surgery
Mehdi Mohamadnejad, Daniel Mullady, Dayna S Early, Brian Collins, Carrie Marshall, Sharon Sams, Roy Yen, Mona Rizeq, Maria Romanas, Samia Nawaz, Ozlem Ulusarac, Thomas Hollander, Robert H Wilson, Violette C Simon, Vladimir Kushnir, Stuart K Amateau, Brian C Brauer, Srinivas Gaddam, Riad R Azar, Srinadh Komanduri, Raj Shah, Ananya Das, Steven Edmundowicz, V Raman Muthusamy, Amit Rastogi, Sachin Wani
BACKGROUND & AIMS: It is not clear exactly how many passes are required to determine whether pancreatic masses are malignant using endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA). We aimed to define the per-pass diagnostic yield of EUS-FNA for establishing the malignancy of a pancreatic mass, and identify factors associated with detection of malignancies. METHODS: In a prospective study, 239 patients with solid pancreatic masses were randomly assigned to groups that underwent EUS-FNA, with the number of passes determined by an on-site cytopathology evaluation or set at 7 passes, at 3 tertiary referral centers...
December 23, 2016: Clinical Gastroenterology and Hepatology
Saleh Elwir, Julie Thompson, Stuart K Amateau, Guru Trikudanathan, Rajeev Attam, Mohamed Hassan, Raja Kandaswamy, Timothy Pruett, John Lake, Srinath Chinnakotla, Martin L Freeman, Mustafa A Arain
BACKGROUND AND AIMS: Biliary complications (BCs) occur in up to 40% of living donor liver transplant (LDLT) recipients. The aim of this study was to evaluate the efficacy of endoscopic therapy in the management of LDLT-related BCs. METHODS: A retrospective study of 100 LDLT recipients at a single transplant center over a 9-year period was conducted. BC was defined as a biliary leak and/or a stricture. Patient records were used to identify time to diagnosis, type of intervention, and time to resolution...
January 2017: Digestive Diseases and Sciences
Guru Trikudanathan, Satish Munigala, Usman Barlass, Ahmad Malli, Yusheng Han, Miroslav Sekulic, Melena Bellin, Srinath Chinnakotla, Ty Dunn, Timothy Pruett, Gregory Beilman, Jose-Vega Peralta, Mustafa Arain, Stuart Amateau, Shawn Mallery, Martin L Freeman, Rajeev Attam
BACKGROUND: Rosemont classification for chronic pancreatitis has not been evaluated specifically in non-calcific chronic pancreatitis (NCCP) patients and to this date, it has not been correlated with the gold standard namely histopathology. OBJECTIVE: To assess the correlation of EUS Rosemont criteria for NCCP with histopathology from surgical specimens and evaluate the impact of age, sex, BMI, smoking and alcohol on Rosemont classification. METHODS: Adult patients undergoing TPIAT for NCCP between July 2009 and January 2013 were identified from our institutional database...
October 26, 2016: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
Nicholas M McDonald, Mustafa A Arain, James S Mallery, Martin L Freeman, Stuart K Amateau
No abstract text is available yet for this article.
October 2016: American Journal of Gastroenterology
Nicholas M McDonald, Stuart K Amateau
No abstract text is available yet for this article.
October 2016: American Journal of Gastroenterology
Chin Hong Lim, Stuart K Amateau, Sayeed Ikramuddin, Daniel B Leslie
BACKGROUND: Although vertical banded gastroplasty (VBG) is no longer performed in the USA, due to its popularity in 1980s, many patients still possess this anatomy with its inherent complications. The stomal stenosis secondary to tight ring or mesh is traditionally treated with surgical removal of the silastic ring or a complex revision, which was hampered by complications, technical complexity, and invasiveness. We described our experience of endoscopic management of this complex problem and the early outcomes...
August 29, 2016: Obesity Surgery
Rawad Mounzer, Roy Yen, Carrie Marshall, Sharon Sams, Sanjana Mehrotra, Mohamed Sherif Said, Joshua C Obuch, Brian Brauer, Augustin Attwell, Norio Fukami, Raj Shah, Stuart Amateau, Matthew Hall, Lindsay Hosford, Robert Wilson, Amit Rastogi, Sachin Wani
BACKGROUND AND AIMS: Endoscopic ultrasound with fine needle aspiration (EUS-FNA) has become the standard of care in the evaluation of solid pancreatic lesions. Limited data exist on interobserver agreement (IOA) among cytopathologists in assessing solid pancreatic EUS-FNA specimens. This study aimed to evaluate IOA among cytopathologists in assessing EUS-FNA cytology specimens of solid pancreatic lesions using a novel standardized scoring system and to assess individual clinical and cytologic predictors of IOA...
July 2016: Endoscopy International Open
Nicholas M McDonald, Kaysie L Banton, Sayeed Ikramuddin, Martin L Freeman, Stuart K Amateau
No abstract text is available yet for this article.
December 2016: Gastrointestinal Endoscopy
Stuart K Amateau, Martin L Freeman
No abstract text is available yet for this article.
September 2016: Gastrointestinal Endoscopy
Chin Hong Lim, Sayeed Ikramuddin, Daniel B Leslie, Mustafa A Arain, Stuart K Amateau
No abstract text is available yet for this article.
2016: Endoscopy
Guru Trikudanathan, Shawn J Mallery, Stuart K Amateau
Surgical resection is considered the standard of care in the management of symptomatic insulinoma. In this video, we describe the successful management of a symptomatic insulinoma by using linear array endoscopic ultrasound (EUS)-guided ethanol ablation in a poor surgical candidate. EUS-guided ethanol ablation of insulinoma offers a safer, effective, and less invasive alternative to surgery.
July 2016: Clinical Endoscopy
Chin Hong Lim, Stuart K Amateau, Arain Mustafa, Sayeed Ikramuddin, Daniel B Leslie
No abstract text is available yet for this article.
August 2016: Gastrointestinal Endoscopy
Reema Mallick, Kevin Rank, Carrie Ronstrom, Stuart K Amateau, Mustafa Arain, Rajeev Attam, Martin L Freeman, James V Harmon
BACKGROUND AND AIMS: The option for performing ERCP and laparoscopic cholecystectomy (LC) for the management of choledocholithiasis in the same operative session is often overlooked. We compared the success, safety, and cost of ERCP and LC when performed in either a single session or in separate sessions. METHODS: We conducted a retrospective cohort study at a U.S. tertiary care hospital. We identified patients undergoing ERCP and LC between April 2011 and August 2014 in either a single operative session (n = 33) or in 2 separate sessions within a 30-day period (n = 80)...
October 2016: Gastrointestinal Endoscopy
Guru Trikudanathan, Jose Vega-Peralta, Ahmad Malli, Satish Munigala, Yusheng Han, Melena Bellin, Usman Barlass, Srinath Chinnakotla, Ty Dunn, Timothy Pruett, Gregory Beilman, Mustafa Arain, Stuart K Amateau, Shawn Mallery, Martin L Freeman, Rajeev Attam
OBJECTIVES: Studies correlating endoscopic ultrasound (EUS) with histopathology for chronic pancreatitis (CP) are limited by small sample size, and/or inclusion of many patients without CP, limiting applicability to patients with painful CP. The aim of this study was to assess correlation of standard EUS features for CP with surgical histopathology in a large cohort of patients with non-calcific CP (NCCP). METHODS: Adult patients undergoing total pancreatectomy and islet autotransplantation (TPIAT) for NCCP, between 2008 and 2013, with EUS <1 year before surgery...
April 2016: American Journal of Gastroenterology
Sachin Wani, Matthew Hall, Andrew Y Wang, Christopher J DiMaio, V Raman Muthusamy, Rajesh N Keswani, Brian C Brauer, Jeffrey J Easler, Roy D Yen, Ihab El Hajj, Norio Fukami, Kourosh F Ghassemi, Susana Gonzalez, Lindsay Hosford, Thomas G Hollander, Robert Wilson, Vladimir M Kushnir, Jawad Ahmad, Faris Murad, Anoop Prabhu, Rabindra R Watson, Daniel S Strand, Stuart K Amateau, Augustin Attwell, Raj J Shah, Dayna Early, Steven A Edmundowicz, Daniel Mullady
BACKGROUND AND AIMS: There are limited data on learning curves and competence in ERCP. By using a standardized data collection tool, we aimed to prospectively define learning curves and measure competence among advanced endoscopy trainees (AETs) by using cumulative sum (CUSUM) analysis. METHODS: AETs were evaluated by attending endoscopists starting with the 26th hands-on ERCP examination and then every ERCP examination during the 12-month training period. A standardized ERCP competency assessment tool (using a 4-point scoring system) was used to grade the examination...
April 2016: Gastrointestinal Endoscopy
Guru Trikudanathan, Sidney P Walker, Satish Munigala, Ben Spilseth, Ahmad Malli, Yusheng Han, Melena Bellin, Srinath Chinnakotla, Ty Dunn, Timothy L Pruett, Gregory J Beilman, Jose Vega Peralta, Mustafa A Arain, Stuart K Amateau, Sarah J Schwarzenberg, Shawn Mallery, Rajeev Attam, Martin L Freeman
OBJECTIVES: Diagnosis of non-calcific chronic pancreatitis (NCCP) in patients presenting with chronic abdominal pain is challenging and controversial. Contrast-enhanced magnetic resonance imaging (MRI) with secretin-stimulated MRCP (sMRCP) offers a safe and noninvasive modality to diagnose mild CP, but its findings have not been correlated with histopathology. We aimed to assess the correlation of a spectrum of MRI/sMRCP findings with surgical histopathology in a cohort of NCCP patients undergoing total pancreatectomy with islet autotransplantation (TPIAT)...
November 2015: American Journal of Gastroenterology
Srinath Chinnakotla, Gregory J Beilman, Ty B Dunn, Melena D Bellin, Martin L Freeman, David M Radosevich, Mustafa Arain, Stuart K Amateau, J Shawn Mallery, Sarah J Schwarzenberg, Alfred Clavel, Joshua Wilhelm, R Paul Robertson, Louise Berry, Marie Cook, Bernhard J Hering, David E R Sutherland, Timothy L Pruett
OBJECTIVE: Our objective was to analyze factors predicting outcomes after a total pancreatectomy and islet autotransplantation (TP-IAT). BACKGROUND: Chronic pancreatitis (CP) is increasingly treated by a TP-IAT. Postoperative outcomes are generally favorable, but a minority of patients fare poorly. METHODS: In our single-centered study, we analyzed the records of 581 patients with CP who underwent a TP-IAT. Endpoints included persistent postoperative "pancreatic pain" similar to preoperative levels, narcotic use for any reason, and islet graft failure at 1 year...
October 2015: Annals of Surgery
Sachin Wani, Daniel Mullady, Dayna S Early, Amit Rastogi, Brian Collins, Jeff F Wang, Carrie Marshall, Sharon B Sams, Roy Yen, Mona Rizeq, Maria Romanas, Ozlem Ulusarac, Brian Brauer, Augustin Attwell, Srinivas Gaddam, Thomas G Hollander, Lindsay Hosford, Sydney Johnson, Vladimir Kushnir, Stuart K Amateau, Cara Kohlmeier, Riad R Azar, John Vargo, Norio Fukami, Raj J Shah, Ananya Das, Steven A Edmundowicz
OBJECTIVES: Observational data on the impact of on-site cytopathology evaluation (OCE) during endoscopic ultrasonography-guided fine needle aspiration (EUS-FNA) of pancreatic masses have reported conflicting results. We aimed to compare the diagnostic yield of malignancy and proportion of inadequate specimens between patients undergoing EUS-FNA of pancreatic masses with and without OCE. METHODS: In this multicenter randomized controlled trial, consecutive patients with solid pancreatic mass underwent randomization for EUS-FNA with or without OCE...
October 2015: American Journal of Gastroenterology
Phillip S Ge, Srinivas Gaddam, Joseph W Keach, Daniel Mullady, Norio Fukami, Steven A Edmundowicz, Riad R Azar, Raj J Shah, Faris M Murad, Vladimir M Kushnir, Kourosh F Ghassemi, Alireza Sedarat, Rabindra R Watson, Stuart K Amateau, Brian C Brauer, Roy D Yen, Lindsay Hosford, Thomas Hollander, Timothy R Donahue, Richard D Schulick, Barish H Edil, Martin D McCarter, Csaba Gajdos, Augustin R Attwell, V Raman Muthusamy, Dayna S Early, Sachin Wani
OBJECTIVE: Endoscopic ultrasound (EUS) plays an integral role in the evaluation of pancreatic cysts lesions (PCLs). The aim of the study was to determine predictors of surgical referral in patients with PCLs undergoing EUS. METHODS: We performed a multicenter retrospective study of patients undergoing EUS for evaluation of PCLs. Demographics, EUS characteristics, and fine-needle aspiration results were recorded. Patients were categorized into surgery or surveillance groups on the basis of post-EUS recommendations...
January 2016: Pancreas
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