Amitabh Chak

Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland

Affiliated withCase Western Reserve University School of Medicine, Cleveland

Research Area

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JoVE Journal Publications

ArticleTotal : 1	Year
Publication title Cited by 51	2013

Other Publications

Article	Year
Hypernephroma metastatic to the pancreas. Gastrointestinal endoscopy\| PubMed ID: 11756922	2002
Acute pancreatitis resulting from a nonfunctional islet cell tumor detected and localized by EUS. Gastrointestinal endoscopy\| PubMed ID: 11756932	2002
Accuracy of a narrow-diameter battery-powered endoscope in sedated and unsedated patients. Gastrointestinal endoscopy\| PubMed ID: 11923758	2002
A prospective evaluation of outcome in patients referred for PEG placement. Gastrointestinal endoscopy\| PubMed ID: 11923761	2002
Patient tolerance and acceptance of unsedated ultrathin esophagoscopy. Gastrointestinal endoscopy\| PubMed ID: 11979240	2002
Correlation of EUS measurement with pathologic assessment of neoadjuvant therapy response in esophageal carcinoma. Gastrointestinal endoscopy\| PubMed ID: 11979246	2002
EUS-guided fine needle aspiration of idiopathic abdominal masses. Gastrointestinal endoscopy\| PubMed ID: 12024140	2002
EUS-guided fine needle aspiration of the liver: indications, yield, and safety based on an international survey of 167 cases. Gastrointestinal endoscopy\| PubMed ID: 12024141	2002
Association of prediagnosis endoscopy with stage and survival in adenocarcinoma of the esophagus and gastric cardia. Cancer\| PubMed ID: 12115314	2002
EUS in submucosal tumors. Gastrointestinal endoscopy\| PubMed ID: 12297748	2002
Endoscopic ultrasound-guided fine needle aspiration in the diagnosis of mediastinal masses of unknown origin. The American journal of gastroenterology\| PubMed ID: 12385439	2002
Endoscopic retrograde cholangiopancreatography in children and adolescents. Journal of pediatric gastroenterology and nutrition\| PubMed ID: 12454575	2002
Effectiveness of open-access endoscopy in routine primary-care practice. Gastrointestinal endoscopy\| PubMed ID: 12556781	2003
A time for change. Gastrointestinal endoscopy\| PubMed ID: 12585312	2003
Prospective evaluation of 4-mm diameter endoscopes for esophagoscopy in sedated and unsedated patients. Gastrointestinal endoscopy\| PubMed ID: 12612506	2003
Clinical utility of intraductal US for evaluation of choledocholithiasis. Gastrointestinal endoscopy\| PubMed ID: 12709691	2003
Evaluation of a new curved linear array echoendoscopy system for EUS. Gastrointestinal endoscopy\| PubMed ID: 12776050	2003
Unsedated EGD. Gastrointestinal endoscopy\| PubMed ID: 12838235	2003
Criteria for the diagnosis of dysplasia by endoscopic optical coherence tomography. Gastrointestinal endoscopy\| PubMed ID: 12872085	2003
Prediction of outcome in acute lower-gastrointestinal haemorrhage based on an artificial neural network: internal and external validation of a predictive model. Lancet\| PubMed ID: 14575969	2003
Long-term follow-up of patients with clinically indeterminate suspicion of pancreatic cancer and normal EUS. Gastrointestinal endoscopy\| PubMed ID: 14652549	2003
Endoscopic management of adenoma of the major duodenal papilla. Gastrointestinal endoscopy\| PubMed ID: 14745396	2004
Association of ampullary and colorectal malignancies. Cancer\| PubMed ID: 14745868	2004
Innovative methods of biliary tract diagnosis: intraductal ultrasound and tissue acquisition. Gastrointestinal endoscopy clinics of North America\| PubMed ID: 14986789	2003
Sphincter of Oddi manometry does not predispose to post-ERCP acute pancreatitis. Gastrointestinal endoscopy\| PubMed ID: 15044885	2004
Success and shortcomings of a clinical care pathway in the management of acute nonvariceal upper gastrointestinal bleeding. The American journal of gastroenterology\| PubMed ID: 15056080	2004
Acute pancreatitis after EUS-guided FNA of solid pancreatic masses: a pooled analysis from EUS centers in the United States. Gastrointestinal endoscopy\| PubMed ID: 15332028	2004
Does prophylactic pancreatic stent placement reduce the risk of post-ERCP acute pancreatitis? A meta-analysis of controlled trials. Gastrointestinal endoscopy\| PubMed ID: 15472676	2004
Eosinophilic enteritis. Gastrointestinal endoscopy\| PubMed ID: 15472688	2004
Identification of Barrett's esophagus in relatives by endoscopic screening. The American journal of gastroenterology\| PubMed ID: 15554988	2004
An international survey of the clinical practice of EUS. Gastrointestinal endoscopy\| PubMed ID: 15557952	2004
EUS assessment of response to chemoradiation in esophageal cancer patients. The American journal of gastroenterology\| PubMed ID: 15667512	2005
Increased risk of squamous cell esophageal cancer after adjuvant radiation therapy for primary breast cancer. American journal of epidemiology\| PubMed ID: 15692076	2005
Role of endoscopic ultrasonography in the staging of esophageal cancer: a review. Current opinion in gastroenterology\| PubMed ID: 15703592	2003
The yield of bleeding scans in acute lower gastrointestinal hemorrhage. Journal of clinical gastroenterology\| PubMed ID: 15758618	2005
A novel use of endoscopic clips in the treatment planning for radiation therapy (XRT) of esophageal cancer. Journal of clinical gastroenterology\| PubMed ID: 15815203	2005
Endoscopic treatment of high-grade dysplasia and early cancer in Barrett's oesophagus. The lancet oncology\| PubMed ID: 15863379	2005
The changing landscape of practice patterns regarding unsedated endoscopy and propofol use: a national Web survey. Gastrointestinal endoscopy\| PubMed ID: 15990813	2005
Pancreatic cysts: much ado or not enough? Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association\| PubMed ID: 16234040	2005
Accuracy of endoscopic optical coherence tomography in the detection of dysplasia in Barrett's esophagus: a prospective, double-blinded study. Gastrointestinal endoscopy\| PubMed ID: 16301020	2005
In vivo optical coherence tomography imaging of the pancreatic and biliary ductal system. Gastrointestinal endoscopy\| PubMed ID: 16301046	2005
The polyp detection rate of colonoscopy: a national study of Medicare beneficiaries. The American journal of medicine\| PubMed ID: 16378787	2005
Primary care physician attitudes toward endoscopic screening for GERD symptoms and unsedated esophagoscopy. Gastrointestinal endoscopy\| PubMed ID: 16427926	2006
Sedationless upper endoscopy. Reviews in gastroenterological disorders\| PubMed ID: 16520708	2006
Quality indicators for gastrointestinal endoscopic procedures: an introduction. Gastrointestinal endoscopy\| PubMed ID: 16564906	2006
Quality indicators for esophagogastroduodenoscopy. Gastrointestinal endoscopy\| PubMed ID: 16564907	2006
Quality indicators for colonoscopy. Gastrointestinal endoscopy\| PubMed ID: 16564908	2006
Quality indicators for endoscopic retrograde cholangiopancreatography. Gastrointestinal endoscopy\| PubMed ID: 16564909	2006
Quality indicators for endoscopic ultrasonography. Gastrointestinal endoscopy\| PubMed ID: 16564910	2006
Quality indicators for gastrointestinal endoscopic procedures: an introduction. The American journal of gastroenterology\| PubMed ID: 16635230	2006
Quality indicators for colonoscopy. The American journal of gastroenterology\| PubMed ID: 16635231	2006
Quality indicators for esophagogastroduodenoscopy. The American journal of gastroenterology\| PubMed ID: 16635232	2006
Quality indicators for endoscopic retrograde cholangiopancreatography. The American journal of gastroenterology\| PubMed ID: 16635233	2006
Quality indicators for endoscopic ultrasonography. The American journal of gastroenterology\| PubMed ID: 16635234	2006
Endoscopic ultrasonography and prognosis of esophageal cancer. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association\| PubMed ID: 16713744	2006
Association of esophageal adenocarcinoma with other subsequent primary cancers. Journal of clinical gastroenterology\| PubMed ID: 16721221	2006
Temporal trend in relative risk of second primary colorectal cancer. The American journal of gastroenterology\| PubMed ID: 16771959	2006
Sedationless upper endoscopy. Reviews in gastroenterological disorders\| PubMed ID: 16957661	2006
Familiality in Barrett's esophagus, adenocarcinoma of the esophagus, and adenocarcinoma of the gastroesophageal junction. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology\| PubMed ID: 16985029	2006
A primer on natural orifice transluminal endoscopic surgery: building a new paradigm. Surgical innovation\| PubMed ID: 17012148	2006
Gastroesophageal reflux symptoms in patients with adenocarcinoma of the esophagus or cardia. Cancer\| PubMed ID: 17019737	2006
Colorectal screening after polypectomy: a national survey study of primary care physicians. Annals of internal medicine\| PubMed ID: 17088578	2006
Should there be light in the esophageal tunnel? An appraisal of optical coherence tomography in Barrett's esophagus. Gastrointestinal endoscopy\| PubMed ID: 17137853	2007
Gastroesophageal reflux disease-associated esophagitis induces endogenous cytokine production leading to motor abnormalities. Gastroenterology\| PubMed ID: 17241868	2007
Endoscopic Doppler US probe for the diagnosis of gastric varices (with videos). Gastrointestinal endoscopy\| PubMed ID: 17321253	2007
Pancreatic-stent placement for prevention of post-ERCP pancreatitis: a cost-effectiveness analysis. Gastrointestinal endoscopy\| PubMed ID: 17331513	2007
Natural orifice transluminal endoscopic surgery (NOTES) as a diagnostic tool in the intensive care unit. Surgical endoscopy\| PubMed ID: 17364154	2007
Interobserver agreement for EUS findings in familial pancreatic-cancer kindreds. Gastrointestinal endoscopy\| PubMed ID: 17382940	2007
Mechanical lithotripsy of pancreatic and biliary stones: complications and available treatment options collected from expert centers. The American journal of gastroenterology\| PubMed ID: 17573790	2007
Consortium approach to identifying genes for Barrett's esophagus and esophageal adenocarcinoma. Translational research : the journal of laboratory and clinical medicine\| PubMed ID: 17585859	2007
Postprocedure radiologist's interpretation of ERCP x-ray films: a prospective outcomes study. Gastrointestinal endoscopy\| PubMed ID: 17591478	2007
Unsedated small-caliber endoscopy--a new screening and surveillance tool for Barrett's esophagus? Nature clinical practice. Gastroenterology & hepatology\| PubMed ID: 17622226	2007
Ultrathin esophagoscopy in screening for Barrett's esophagus at a Veterans Administration Hospital: easy access does not lead to referrals. The American journal of gastroenterology\| PubMed ID: 17764497	2008
Complete endoscopic closure of gastric defects using a full-thickness tissue plicating device. Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract\| PubMed ID: 17957435	2008
Carbohydrate consumption and esophageal cancer:an ecological assessment. The American journal of gastroenterology\| PubMed ID: 17986316	2008
EUS spectrum analysis for in vivo characterization of pancreatic and lymph node tissue: a pilot study. Gastrointestinal endoscopy\| PubMed ID: 18028925	2007
Artificial neural network as a predictive instrument in patients with acute nonvariceal upper gastrointestinal hemorrhage. Gastroenterology\| PubMed ID: 18061180	2008
Quality in endoscopy: it starts during fellowship. Gastrointestinal endoscopy\| PubMed ID: 18155433	2008
Late phase TNF-alpha depression in natural orifice translumenal endoscopic surgery (NOTES) peritoneoscopy. Surgery\| PubMed ID: 18291252	2008
EUS-FNA in unresectable cholangiocarcinoma: a novel indication. Gastrointestinal endoscopy\| PubMed ID: 18294505	2008
Infectious implications in the porcine model of natural orifice transluminal endoscopic surgery (NOTES) with PEG-tube closure: a quantitative bacteriologic study. Gastrointestinal endoscopy\| PubMed ID: 18407267	2008
Creation of an effective and reproducible nonsurvival porcine model that simulates actively bleeding peptic ulcers. Gastrointestinal endoscopy\| PubMed ID: 18620348	2008
EUS in localizing safe alternate access sites for natural orifice transluminal endoscopic surgery: initial experience in a porcine model. Gastrointestinal endoscopy\| PubMed ID: 18635176	2009
What is the evidence for EUS-guided celiac plexus block/neurolysis? Gastrointestinal endoscopy\| PubMed ID: 19179150	2009
EUS and natural orifice transluminal endoscopic surgery. Gastrointestinal endoscopy\| PubMed ID: 19179159	2009
EUS 2008 Working Group document: evaluation of EUS-guided vascular therapy. Gastrointestinal endoscopy\| PubMed ID: 19179168	2009
Phase II and pharmacokinetic trial of rebeccamycin analog in advanced biliary cancers. Cancer chemotherapy and pharmacology\| PubMed ID: 19399502	2009
Radiofrequency ablation in Barrett's esophagus with dysplasia. The New England journal of medicine\| PubMed ID: 19474425	2009
Assessment of familiality, obesity, and other risk factors for early age of cancer diagnosis in adenocarcinomas of the esophagus and gastroesophageal junction. The American journal of gastroenterology\| PubMed ID: 19491834	2009
Receipt of previous diagnoses and endoscopy and outcome from esophageal adenocarcinoma: a population-based study with temporal trends. The American journal of gastroenterology\| PubMed ID: 19491849	2009
Asymptomatic pancreatic cystic neoplasm: a cost-effectiveness analysis of different strategies of management. Gastrointestinal endoscopy\| PubMed ID: 19647240	2009
Sedation during endoscopy for patients at risk of obstructive sleep apnea. Gastrointestinal endoscopy\| PubMed ID: 19660748	2009
Are large side holes associated with reduced rates of pancreatic stent occlusion? Results of a prospective study. JOP : Journal of the pancreas\| PubMed ID: 19734624	2009
In vivo characterization of pancreatic and lymph node tissue by using EUS spectrum analysis: a validation study. Gastrointestinal endoscopy\| PubMed ID: 19922913	2010
Characterization of pancreatic cancer and intra-abdominal lymph node malignancy using spectrum analysis of endoscopic ultrasound imaging. Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference\| PubMed ID: 19964019	2009
A segregation analysis of Barrett's esophagus and associated adenocarcinomas. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology\| PubMed ID: 20200424	2010
Variability in measurements of pancreatic cyst size among EUS, CT, and magnetic resonance imaging modalities. Gastrointestinal endoscopy\| PubMed ID: 20231021	2010
The diagnostic efficacy of natural orifice transluminal endoscopic surgery: is there a role in the intensive care unit? Surgical endoscopy\| PubMed ID: 20333404	2010
Endoscopic mucosal resection with full-thickness closure for difficult polyps: a prospective clinical trial. Gastrointestinal endoscopy\| PubMed ID: 20438900	2010
Hydroperitoneum-facilitated EUS-guided peritoneal entry and closure of alternate access sites for NOTES. Surgical innovation\| PubMed ID: 20504785	2010
Primary malignant melanoma of the hepatic duct: a case report. Gastrointestinal endoscopy\| PubMed ID: 20538271	2010
Endoscopic Doppler US for the prevention of ulcer bleeding after endoscopic submucosal dissection for early gastric cancer: a preliminary study (with video). Gastrointestinal endoscopy\| PubMed ID: 20541199	2010
Transgastric natural-orifice transluminal endoscopic surgery peritoneoscopy in humans: a pilot study in efficacy and gastrotomy site selection by using a hybrid technique. Gastrointestinal endoscopy\| PubMed ID: 20541750	2010
Updated guidelines for live endoscopy demonstrations. Gastrointestinal endoscopy\| PubMed ID: 20598240	2010
Biopsy depth after radiofrequency ablation of dysplastic Barrett's esophagus. Gastrointestinal endoscopy\| PubMed ID: 20598302	2010
EUS and survival in patients with pancreatic cancer: a population-based study. Gastrointestinal endoscopy\| PubMed ID: 20620274	2010
Initial evaluation of a novel, prototype, forward-viewing echoendoscope in a porcine arterial bleeding model (with video). Gastrointestinal endoscopy\| PubMed ID: 20630519	2010
EUS compared with endoscopy plus transabdominal US in the initial diagnostic evaluation of patients with upper abdominal pain. Gastrointestinal endoscopy\| PubMed ID: 20650452	2010
Screening for Barrett's Esophagus. Techniques in gastrointestinal endoscopy\| PubMed ID: 20657789	2010
Experience with the new 4-way, 5.5-mm ultrathin endoscope: a case series. Digestive diseases and sciences\| PubMed ID: 20668940	2011
Covered stents for the treatment of life-threatening cervical esophageal anastomotic leaks. The Journal of thoracic and cardiovascular surgery\| PubMed ID: 20709337	2011
Endoscopically guided spectral-domain OCT with double-balloon catheters. Optics express\| PubMed ID: 20721123	2010
Gender disparities and gastroenterology trainee attitudes toward advanced endoscopic training. Gastrointestinal endoscopy\| PubMed ID: 21034911	2010
Endoscopic access to and exploration of the lesser sac in a human cadaver model: opportunity for transgastric endoscopic pancreatic surgery (with video). Surgical endoscopy\| PubMed ID: 21359880	2011
Prevalence of Barrett esophagus in first-degree relatives of patients with esophageal adenocarcinoma. Journal of clinical gastroenterology\| PubMed ID: 21617543	2011
Durability of radiofrequency ablation in Barrett's esophagus with dysplasia. Gastroenterology\| PubMed ID: 21679712	2011
Prevalence and clinical significance of pancreatic cysts associated with cysts in other organs. Digestive and liver disease : official journal of the Italian Society of Gastroenterology and the Italian Association for the Study of the Liver\| PubMed ID: 21680268	2011
Endoscopic management of Barrett esophagus. Nature reviews. Gastroenterology & hepatology\| PubMed ID: 21894201	2011
Association of insulin and insulin-like growth factors with Barrett's oesophagus. Gut\| PubMed ID: 21930730	2012
Racial differences in measures of obesity and risk of colon adenoma. Obesity (Silver Spring, Md.)\| PubMed ID: 21996657	2012
Motion artifacts associated with in vivo endoscopic OCT images of the esophagus. Optics express\| PubMed ID: 21997082	2011
Insulin resistance, central obesity, and risk of colorectal adenomas. Cancer\| PubMed ID: 22009143	2012
DNA methylation profiling in Barrett's esophagus and esophageal adenocarcinoma reveals unique methylation signatures and molecular subclasses. Epigenetics : official journal of the DNA Methylation Society\| PubMed ID: 22139570	2011
Aberrantly methylated PKP1 in the progression of Barrett's esophagus to esophageal adenocarcinoma. Genes, chromosomes & cancer\| PubMed ID: 22170739	2012
Variation in age at cancer diagnosis in familial versus nonfamilial Barrett's esophagus. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology\| PubMed ID: 22178570	2012
EUS or percutaneously guided intratumoral TNFerade biologic with 5-fluorouracil and radiotherapy for first-line treatment of locally advanced pancreatic cancer: a phase I/II study. Gastrointestinal endoscopy\| PubMed ID: 22248601	2012
The microRNAs, MiR-31 and MiR-375, as candidate markers in Barrett's esophageal carcinogenesis. Genes, chromosomes & cancer\| PubMed ID: 22302717	2012
Aberrant vimentin methylation is characteristic of upper gastrointestinal pathologies. Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology\| PubMed ID: 22315367	2012
Feasibility, safety, acceptability, and yield of office-based, screening transnasal esophagoscopy (with video). Gastrointestinal endoscopy\| PubMed ID: 22425272	2012
Small bowel capsule endoscopy in patients with cardiac pacemakers and implantable cardioverter defibrillators: Outcome analysis using telemetry review. World journal of gastrointestinal endoscopy\| PubMed ID: 22442746	2012
A randomized trial of rectal indomethacin to prevent post-ERCP pancreatitis. The New England journal of medicine\| PubMed ID: 22494121	2012
Characterization of the pancreas in vivo using EUS spectrum analysis with electronic array echoendoscopes. Gastrointestinal endoscopy\| PubMed ID: 22498178	2012
Phase I evaluation of TNFerade biologic plus chemoradiotherapy before esophagectomy for locally advanced resectable esophageal cancer. Gastrointestinal endoscopy\| PubMed ID: 22520270	2012
Consensus statements for management of Barrett's dysplasia and early-stage esophageal adenocarcinoma, based on a Delphi process. Gastroenterology\| PubMed ID: 22537613	2012
Development of subsquamous high-grade dysplasia and adenocarcinoma after successful radiofrequency ablation of Barrett's esophagus. Gastroenterology\| PubMed ID: 22561053	2012
Immediate unprepared hydroflush colonoscopy for severe lower GI bleeding: a feasibility study. Gastrointestinal endoscopy\| PubMed ID: 22658390	2012
Biodegradable esophageal stent placement does not prevent high-grade stricture formation after circumferential mucosal resection in a porcine model. Surgical endoscopy\| PubMed ID: 22684976	2012
A combination of esomeprazole and aspirin reduces tissue concentrations of prostaglandin E(2) in patients with Barrett's esophagus. Gastroenterology\| PubMed ID: 22796132	2012
Preservation and Incorporation of Valuable Endoscopic Innovations (PIVI) on the use of endoscopy simulators for training and assessing skill. Gastrointestinal endoscopy\| PubMed ID: 22809879	2012
International Cancer of the Pancreas Screening (CAPS) Consortium summit on the management of patients with increased risk for familial pancreatic cancer. Gut\| PubMed ID: 23135763	2013
Does rectal indomethacin eliminate the need for prophylactic pancreatic stent placement in patients undergoing high-risk ERCP? Post hoc efficacy and cost-benefit analyses using prospective c... The American journal of gastroenterology\| PubMed ID: 23295278	2013
Cap-assisted ERCP with a forward-viewing gastroscope as a rescue endoscopic intervention in patients with Billroth II anatomy. Surgical endoscopy\| PubMed ID: 23392985	2013
Association of Barrett's Esophagus With Type II Diabetes Mellitus: Results From a Large Population-based Case-Control Study. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association\| PubMed ID: 23591277	2013
Prevalence of extra-esophageal cancers in patients with Barrett's esophagus and esophageal adenocarcinoma. Tropical gastroenterology : official journal of the Digestive Diseases Foundation\| PubMed ID: 23600048	2012
Barrett's esophagus and the risk of obstructive sleep apnea: a case-control study. BMC gastroenterology\| PubMed ID: 23663216	2013
Preliminary results of antiscarring therapy in the prevention of postendoscopic esophageal mucosectomy strictures. Surgical endoscopy\| PubMed ID: 24100858	2013