2003 Ford Expedition Headlight Bulb Size, Analysis of Biopsies From Duodenal Bulbs of All .. by SA Stoven · 2016 · Cited by 28 — We investigated whether analysis of biopsies from duodenal bulbs of all patients undergoing endoscopy (a population with a low probability for celiac disease) .People also askYou will see more English now.Why do they do a duodenal bulb biopsy?What can be diagnosed from a duodenum biopsy?Why would gastroenterologist take biopsies of duodenum?Does duodenum biopsy hurt?Feedback 2003 Ford F150 Headlight Bulb Size, Duodenal GI Photo Gallery. Duodenal ulcer. Endoscopic view of an ulcer in the duodenal bulb of a 12-year-old who presented with hematemesis. photo · Celiac Disease. King Von Moncler Jacket, Duodenal Biopsy - StatPearls. by D Friedel · 2022 · Cited by 2 — Biopsy of the duodenum is performed during an upper endoscopy to yield tissue . at least two biopsies each in the duodenal bulb and descending duodenum.Complementary Results 2003 Jeep Grand Cherokee Headlight Bulb, Things to know. by PR Salmon · 1972 · Cited by 54 — In this paper, which is concerned chiefly with endoscopic examination of the duodenal bulb (bulboscopy), we describe the indications, procedures, and results . 2004 Buick Lesabre Headlight Bulb, Endoscopic Examination of the Duodenal Bulb. by JP Belber · 1971 · Cited by 71 — In 144 cases endoscopic and X-ray diagnosis of duodenal bulb pathology agreed; in 37, the diagnosis was made only by endoscopy; and in 19, by X-ray alone. Of 59 . 2004 Chevy Silverado Headlight Bulb Size, Analysis of Biopsies From Duodenal Bulbs of All .. by SA Stoven · 2016 · Cited by 28 — Standard protocol for sampling the distal duodenum includes 4 single-pass biopsies. Sampling of the duodenal bulb involves 2 single-pass . 2004 Corolla Headlight Bulb, Duodenal bulb biopsies and celiac disease. by L Elli · 2011 · Cited by 1 — Linked Article. Prospective study of the role of duodenal bulb biopsies in the diagnosis of celiac disease. Gastrointestinal EndoscopyVol. 72 . Moncler Alyx Jacket, Duodenal bulb for diagnosing adult celiac disease. by R Nenna · 2012 · Cited by 6 — Duodenal bulb for diagnosing adult celiac disease: much more than an optimal biopsy . In this way, endoscopic examination could reach very high values of . 2004 Ford Ranger Headlight Bulb, Endoscopic resection of duodenal bulb neuroendocrine tumor .. by S Yokoyama · 2011 · Cited by 18 — Endoscopic treatment for duodenal bulb neuroendocrine tumor larger than 10 mm is still controversial. This report presents four cases . 2004 Hyundai Sonata Headlight Bulb, Endoscopic Examination of the Duodenal Bulb. by JP Belber · 1971 · Cited by 71 — In 144 cases endoscopic and X-ray diagnosis of duodenal bulb pathology agreed; in 37, the diagnosis was made only by endoscopy; and in 19, by X-ray alone. Of 59 . 2004 Nissan Titan Headlight Bulb, Endoscopic Examination of the Duodenal Bulb. by JP Belber · 1971 · Cited by 71 — In 144 cases endoscopic and X-ray diag- nosis of duodenal bulb pathology agreed; in 37, the diagnosis was made only by endoscopy; and in 19, by X-ray alone. 2004 Silverado Headlight Bulb Size, Analysis of Biopsies From Duodenal Bulbs of All . - YouTube. 3:02Dr. Joseph A. Murray discusses his manuscript "Analysis of Biopsies From Duodenal Bulbs of All Endoscopy Patients Increases Detection of .YouTube · AmerGastroAssn · Oct 28, 20163 key moments in this video 2004 Toyota Camry Headlight Bulb Size, Two‐stage endoscopic resection of a huge duodenal tumor. by N Takeuchi — An 82-year-old male underwent esophagogastroduodenoscopy, which revealed a tumor in the duodenal bulb. It was a huge lesion and occupied the . 2005 Chevy Cobalt Headlight Bulb, The endoscopic course of scattered white spots in .. Endoscopic finding of SWS in the descending duodenum is not specific and etiologies . open cardia, gastritis, bulbitis and gastric and duodenal ulcers. Moncler Armoise Jacket, Duodenal Mucosa-Associated Lymphoid Tissue Lymphomas. by SJ Kim · 2013 · Cited by 9 — A 52-year-old man underwent endoscopy due to abdominal pain, which demonstrated a depressed lesion on duodenal bulb. 2005 Dodge Caravan Headlight Bulb, Endoscopic ultrasound (EUS) aspect of duodenal bulb .. by L Barresi · 2011 · Cited by 1 — Gastroscopy confirmed a villous lesion in the duodenal bulb, involving the infero- posterior wall (○". Fig. 2 c). EUS showed that the intraduodenal lesion . 2005 Headlight Bulb, Duodenal bulb. The duodenal bulb is the portion of the duodenum closest to the stomach. It normally has a length of about 5 centimeters. The duodenal bulb begins at the . 2005 Nissan Maxima Headlight Bulb, "Bubbly" duodenal bulb in celiac disease. by endoscopy. Multiple biopsies of the duodenal bulb and descending duodenum. (figs. 1B and 1C) demon- strated peptic duodenitis superimposed on changes. Moncler Bardanette Jacket, Level 2 Endoscopy. PDFfrom the duodenal bulb and at least six biopsies from the second portion of the duodenum). 1 will be obtained, using biopsy forceps. 2005 Nissan Titan Headlight Bulb, A lesion in the duodenal bulb. A 61-year-old woman is referred for obstructive jaundice because of unresectable pancreatic cancer. She undergoes endoscopic sphincterotomy and placement of a . 2005 Prius Headlight Bulb Replacement, endoscopic features of duodenal ulcer. almost always occurs in the pyloric channel and the first part of the duodenum - the duodenal bulb; benign ulcers generally have a regular outline; . 2005 Tacoma Headlight Bulb, Endoscopic diagnosis of celiac disease. Traditionally celiac disease is diagnosed using duodenal biopsies in combination with serum autoantibodies (1). Since the improvement of video endoscopes that . 2005 Toyota Corolla Headlight Bulb Size, Biopsy protocols. D1, duodenal bulb; D2, second part of .. D1, duodenal bulb; D2, second part of duodenum. from publication: Quality indicators in diagnostic upper gastrointestinal endoscopy | Upper gastrointestinal . 2005 Toyota Matrix Headlight Bulb, Duodenal bulb sampling barely increased celiac yield in .. Nov 1, 2016 — Separate sampling of the duodenal bulb increased detection of celiac disease by only 0.1% when endoscopy patients had a low pretest . 2006 Dodge Dakota Headlight Bulb, Prospective study of the role of duodenal bulb biopsies in .. PDFby S Gonzalez · 2010 · Cited by 119 — Patients: Patients undergoing upper endoscopy with biopsy for diagnosis or follow-up of celiac disease and control patients. Interventions: Blinded review of . 2006 Honda Civic Headlight Bulb Type, Significance of duodenal mucosal lesions. by SW Lee · 2017 · Cited by 2 — Upper gastrointestinal endoscopy is widely used in Korea not only for . The duodenal bulb is the most common location of duodenal ulcers. 2006 Jeep Grand Cherokee Headlight Bulb, Introduction to Duodenal Bulb. An overview of Duodenal Bulb: upper gastrointestinal endoscopy, endoscopic ultrasound guided, Deformed Duodenal Bulb, Proximal Duodenal Bulb, 2006 Lexus Is250 Headlight Bulb, "Gastritis" of nodular bulb-duodenal mucosa?. Seldom, the endoscopic examination of the duodenum reveals the nodular appearance of the mucosa on a variable surface area. Duodenal nodules are often benign . Moncler Boed Jacket, Duodenum and Small Bowel. Feb 13, 2015 — Routine endoscopy is primarily limited to examination of the duodenal bulb and second portion of the duodenum, with an occasional glimpse of . 2006 Scion Xb Headlight Bulb, Comparison of Endoscopic and Histological Findings .. by P Semwal · 2018 · Cited by 16 — Upper gastrointestinal endoscopy and duodenal biopsy was . level of the duodenal bulb, second and third parts of the duodenum were noted. 2006 Silverado Headlights Bulbs, Endoscopic orientation within the duodenal bulb. - Abstract. by RJ Straker · 1992 · Cited by 9 — Laparotomy performed for bleeding duodenal ulcer after diagnostic/therapeutic endoscopy revealed a disparity in location of the lesion on several occasions . 2007 Buick Lacrosse Headlight Bulb, Duodenal Ulcer - The Gastrointestinalatlas. Ulcers opposite from each other on the anterior and posterior walls in the duodenal bulb. Video Endoscopic Sequence 1 of 5. Image and Video Clip of Duodenal . 2007 Cadillac Escalade Headlight Bulb Replacement, Duodenal Bulb Histology in Paediatric Celiac Disease. by E Boschee · 2020 · Cited by 6 — Classical intestinal endoscopic changes include duodenitis, scalloping and blunting of the duodenal folds (3). 2007 Chevy Impala Headlight Bulb Replacement, Duodenal Bumps. PDFApr 16, 2007 — Location: duodenal bulb, but may involve second or third portion of the duodenum . Endoscopic appearance: submucosal nodule, cut surface. Moncler Chambon Jacket, The Significance and Management of Nonampullary .. by FH Al-Kawas · Cited by 3 — Other encountered pathology, particularly in the duodenal bulb, . FA-K Therapeutic options for NAD polyps include endoscopic removal or surgical resection . 2007 Chrysler Town And Country Headlight Bulb, What are Duodenal Polyps?. The duodenum is the first part of the small bowel immediately after the stomach. · Duodenal polyps are found in 0.3 – 4.6% of patients who have an endoscopy (a . 2007 Crv Headlight Bulb, Esophagogastroduodenoscopy (EGD). Feb 4, 2022 — . esophagus, stomach, and duodenum. An enteroscope, a longer endoscope, can be introduced beyond the ligament of Treitz into the jejunum. 2007 Gmc Acadia Headlight Bulb, Red Spot Lesions in the Duodenal Bulb Are a Highly .. by JA Silvester · 2019 · Cited by 1 — Red Spot Lesions in the Duodenal Bulb Are a Highly Specific Endoscopic Sign of Celiac Disease: A Prospective Study : Journal of Pediatric Gastroenterology and . 2007 Gsxr 600 Headlight Bulb Size, Endoscopic Ultrasound Assessment of the Duodenal Wall .. by A Seicean · 2021 — Endoscopic ultrasonography (EUS) has a significant diagnostic yield in this . They are located mainly, if not exclusively, in the duodenal bulb [5]. 2007 Honda Accord Led Headlight Bulb, A Case of Heterotopic Gastric Tissue in Duodenal Bulb .. by S Khan · 2022 · Cited by 1 — It has characteristic endoscopic and pathologic findings that are often mistaken for gastric metaplasia [3]. Although GH is usually asymptomatic . 2007 Honda Ridgeline Headlight Bulb, Endoscopic biopsy technique in the diagnosis of .. PDFby M Latorre · 2015 · Cited by 46 — of the duodenum. Biopsy specimens were also taken from other portions of the GI tract, including the duodenal bulb, when clinically indicated. 2007 Jeep Liberty Headlight Bulb, Diagnostic upper endoscopy. PDF5). 1.3. The duodenum. The duodenum extends from the pylorus to the duodeno- jejunal angle. The duodenal bulb . 2007 Kia Spectra Headlight Bulb, Bleeding Duodenal Ulcer: Strategies in High-Risk Ulcers. by M Mille · 2021 · Cited by 21 — Keywords: Duodenal ulcerBleedingEmbolizationSurgeryEndoscopy . especially when the bleeding site is located on the posterior wall of the duodenal bulb. 2007 Lexus Es 350 Headlight Bulb Size, Bulb biopsies for the diagnosis of celiac disease in pediatric .. PDFby B Mangiavillano · 2010 · Cited by 49 — Conclusions: We suggest examining 4 biopsy samples from the duodenal bulb and . Reprint requests: Benedetto Mangiavillano, MD, Gastrointestinal Endoscopy,. 2007 Ls460 Headlight Bulb, Introduction to Starting Upper Gastrointestinal Endoscopy. by KS Park · Cited by 8 — Diagnostic upper gastrointestinal endoscopy is the most basic of . soon as the endoscope passes through the pylorus, the duodenal bulb is . 2007 Nissan Altima Headlight Bulb Size, Duodenal Bulb Mucosa with Hypertrophic Gastric Oxyntic .. by E Kohan · Cited by 10 — Endoscopic examinations with methylene blue staining and biopsy of the gastric and duodenal mucosa were conducted in all patients every 3–6 months for an . 2007 Nissan Murano Headlight Bulb, A rare mass in the duodenal bulb: Brunner's glands .. by T Guo · 2018 · Cited by 2 — Endoscopic ultrasonography revealed a submucosal mass with heterogeneous echogenicity and a cystic structure (Fig. 1B). Computed tomography (CT) showed a solid . 2007 Ram 1500 Headlight Bulb, Gastric metaplasia in duodenal bulb andCampylobacter .. by M Caselli · 1989 · Cited by 26 — Multiple biopsies were taken from 50 patients with endoscopic appearance of duodenitis in order to study the relationship between gastric metaplasia in duo. 2007 Saturn Aura Headlight Bulb, Quality indicators in diagnostic upper gastrointestinal endoscopy. by W Januszewicz · 2020 · Cited by 28 — (upper esophagus, GEJ, fundus in retroflexion, stomach body, incisura, antrum, duodenal bulb, distal duodenum) + any detected lesion . 2008 Dodge Avenger Headlight Bulb, Duodenal ulcer, duodenal bulb, endoscopy. Duodenal ulcer, duodenal bulb, endoscopy. A florid duodenal ulcer with oedematous surrounding mucosa in the anterior duodenal bulb. © Copyright 28.11.2011. 2008 Ford Fusion Headlight Bulb Replacement, Endoscopic image in the duodenal bulb of non-Hodgkin's .. · Translate this pageNov 30, 2022 — Endoscopic image in the duodenal bulb of non-Hodgkin's large B-cell lymphoma. Case report. Endoscopia [online]. 2022, vol.34, n.1, pp.28-30. 2008 Gmc Sierra Headlight Bulb Size, Duodenal stenosis associated with an ectopic opening of the .. by K Kobayashi · 2021 · Cited by 1 — Endoscopy at our hospital revealed stenosis of the duodenal bulb, which was suspected to be caused by a submucosal tumor and an active ulcer . 2008 Honda Crv Headlight Bulb Size, Painless Endoscopic Repair of Duodenal Ulcer Perforation. by W Yin · 2023 — At 10:40, he went to our hospital today for further diagnosis and treatment, the general gastroscopy showed that the duodenal bulb was . 2008 Honda Element Headlight Bulb, Endoscopic findings in the upper gastrointestinal tract .. by K Graca-Pakulska · 2023 — Moreover, BJA of the stomach and in case of H. pylori negative patients also duodenal bulb deformation were detected exclusively in CD . 2008 Honda Odyssey Headlight Bulb Size, A rare case of Burkitt's lymphoma of the duodenal bulb. by JR Carvalho · 2016 · Cited by 6 — Human immunodeficiency virus infection was diagnosed and upper digestive tract endoscopy showed marked edema and hyperemia of the duodenal bulb with some . 2008 Jetta Headlight Bulb, Diagnostic yield of endoscopic markers for celiac disease. PDFby DV Balaban · 2015 · Cited by 33 — Bulb atrophy and reduced folds in the descending duodenum had a low diagnostic accuracy, while scalloping, mosaic pattern and fissures were highly specific for . 2008 Lexus Rx 350 Headlight Bulb Replacement, Double Pylorus: Report of a Case With Endoscopic Follow- .. by F Fousekis · 2018 · Cited by 11 — Acquired double pylorus is usually an uncommon complication of peptic ulcer that erodes and creates a fistula between the duodenal bulb and the prepyloric . 2008 Nissan Altima Headlight Bulb Size, Stomach, pylorus, normal, gross [ENDOSCOPY]. This is the normal appearance of the gastric antrum extending to the pylorus at the right of center. The first portion of the duodenum (duodenal bulb) is at . 2008 Scion Xb Headlight Bulb Size, The curative effect of endoscopic resection of duodenal .. by Z CHENG · 2014 — Methods Data of 17 patients with duodenal bulb submucosal tumor who underwent en-doscopic dissection in our department and confirmed as duodenal bulb carcinoid . 2008 Suburban Headlight Bulb, Ligation assisted endoscopic mucosal resection of .. by UK Shestha · 2019 — Ligation assisted endoscopic mucosal resection of neuroendocrine tumor of duodenal bulb: a case report with a follow up of 24 months . 2008 Toyota Camry Headlight Bulb Size, The Value of Upper Gastrointestinal Endoscopy. by RR Babb · 1973 · Cited by 2 — Belber JP: Endoscopic examination of the duodenal bulb: A comparison with x-ray . Gastroenterology 61:55-61, 1971. 2008 Volkswagen Jetta Headlight Bulb, Peptic duodenal stricture causing gastric outlet obstruction. Sep 6, 2016 — After relieving gastric distension by nasogastric tube, endoscopy . Surgically treated peptic ulcer and stricture of the duodenal bulb. 2008 Vw Jetta Headlight Bulb, Endoscopic Treatment of Duodenal Bleeding Caused by .. by JN Kim · 2012 · Cited by 6 — (C) Endoscopic ethanol injection at the base of the mass. (D) Follow-up esophagogastroduodenoscopy shows the necrosis of the mass on the duodenal bulb.Fluoroscopic Evaluation of Duodenal Diseases. by LN Johnson · 2022 · Cited by 2 — Compared with endoscopy, fluoroscopy is an inexpensive and . The duodenum begins at the duodenal bulb and ends at the ligament of Treitz, .A Pop Eye Mucosal Bulge in the Duodenal Bulb. Endoscopic techniques such as high-definition white-light endoscopy (HWE), narrow band imaging (NBI), and confocal laser endomicroscopy (CLE) have been applied .50. Diagnostic Upper Gastrointestinal Endoscopy. PDFby JD Mellinger · Cited by 3 — Advance the endoscope to the pylorus and carefully note the pyloric channel and duodenal bulb. Often some of the best views of the bulb are achieved prior to .Endoscopic Mucosal Resection of Duodenal Carcinoid .. Dec 15, 2015 — Results: 43 duodenal carcinoids were resected in 40 patients. 91% of tumors were located in the bulb. All tumors were limited to the mucosa .Duodenal White Spots Mimicking Intestinal Candidiasis. PDFby T Ozgur — and control endoscopy exposed white duodenal spots cleared away three months later. . Endoscopic view of lesions located duodenal bulb. a.Quality standards in upper gastrointestinal endoscopy. PDFby S Beg · 2017 · Cited by 234 — endoscopy: a position statement of the British Society of Gastroenterology (BSG) and . second part of the duodenum and at least one from the duodenal bulb.Upper Gastrointestinal Endoscopy Assessment Manual. PDFDuodenum (bulb, descending part, and papillary region). * If there are findings in the larynx, hypopharynx, or oral cavity, describe the site and findings.Upper Gastrointestinal Endoscopy and .. Aetna considers esophagogastroduodenoscopy (EGD)/upper endoscopy medically . biopsies of the duodenal bulb and 4 or more biopsies of the distal duodenum; .Is this considered incomplete? EGD to duodenal bulb. Sep 26, 2022 — The first code in the EGD series is code 43235, Upper gastrointestinal endoscopy including esophagus, stomach, and either the duodenum .Endoscopic closure of duodenal perforation using an .. by JM Yun · 2022 — A biopsy scar was noted at the duodenal bulb (Fig. 1). A submucosal injection was attempted prior to band ligation, but it yielded .The role of endoscopy in the management of patients with .. PDFby S Banerjee · 2010 · Cited by 165 — Gastrointestinal Endoscopy (ASGE) prepared this text. In preparing this guideline, a search . ticulum, or a true diverticulum of the duodenal bulb.32 En-.Scarred duodenal bulb - Stock Image - C001/2665. Scarred duodenal bulb. Endoscope view of deformation and scarring due to chronic peptic ulcer disease (PUD) in the duodenal bulb.Duodenal Ulcer in Deformed Bulb • Video. Anterior wall duodenal ulcer with deformed bulb. tags: duodenum ulcer endoscopy duodenal ampulla. This user also sharing. Esophageal Achalasia - Extreme .Gastrointestinal Stromal Tumor: GIST Another Duodenal .. Endoscopic ultrasound in duodenal bulb showed a 23.8 mm × 16.8 mm submucosal, hypoechoic mass in the muscularis propria.Healthy Duodenal Bulb by Gastrolab - Science Photo Gallery. May 7, 2013 — Endoscope view of the healthy duodenal bulb (bulbus duodeni), the first part of the duodenum. The duodenum is the start of the small .$25.00Stomach polyps - Symptoms & causes. Stomach, pyloric valve and upper part of small intestine, called the duodenum . Associated Procedures. Upper endoscopy .Orientation in upper gastrointestinal endoscopy—the only .. by A Sivananthan · 2023 — One paper was identified from 1992 showing only a 28% accuracy in endoscopists identifying the posterior duodenal bulb[11].Diagnosis - - - Stomach ulcer. A small tissue sample may also be taken from your stomach or duodenum so it can be tested for the H. pylori bacteria. A gastroscopy is carried out at a hospital .Duodenal Epithelial Polyps: A Clinicopathologic Review. Oct 24, 2018 — Clinical and Endoscopic Findings. Brunner gland hyperplastic/hamartomatous polyps are benign and are preferentially located in the duodenal bulb .Early Endoscopy Of Oesophagus, Stomach, And Duodenal .. by PB Cotton · 1973 · Cited by 315 — Early Endoscopy of Oesophagus, Stomach, and Duodenal. Bulb in Patients with Haematemesis and Melaena. P. B. COTTON, M. T. ROSENBERG, R. P. L. WALDRAM, .Duodenum. by EL Cases — The images show the endoscopic view of the duodenal mucosa and the corresponding histology slide stained with haemotoxylin and eosin (H&E).Normal Duodenal Bulb Photograph by David R. Musher - Pixels. Normal duodenal bulb, the first portion of the duodenum (small intestine) that occurs immediately past the stomach. Uploaded. October 8th, 2018. Statistics.$4.00 · ‎Free delivery · ‎30-day returnsArtificial Intelligence for Upper Gastrointestinal Endoscopy. by F Renna · 2022 · Cited by 8 — Upper GI endoscopy (UGIE) plays a paramount role in early diagnosis and, . organs in the upper GI tract, i.e., larynx, esophagus, stomach, and duodenum.Peptic ulcer disease - Medic's Corner. PDFby A Lanas · 2017 · Cited by 786 — in the duodenal bulb, which might be colonised by and . Endoscopy is the gold standard for diagnosis of peptic ulcer disease.Endoscopic Management of a Duodenal Web - CSurgeries. 3:19Occasionally, type I duodenal atresia with incomplete obstruction may go undiagnosed until later in life. Endoscopic approach to dividing .CSurgeries · Jan 17, 2022Upper Endoscopy Procedure | Colon, Stomach & Liver Center .. What is an Upper Endoscopy? An upper endoscopy enables the physician to look inside the esophagus, stomach, and duodenum (first part of the small intestine) .Practical Pediatric Gastrointestinal Endoscopy. George Gershman, ‎Mike Thomson · 2021 · ‎MedicalFigure 44.6 The anchor attached to the duodenal Figure 44.7 Pseudopolyps at . The tip of the endoscope with the hood is positioned in the duodenal bulb.Principles of Flexible Endoscopy for Surgeons. Jeffrey M. Marks, ‎Brian J. Dunkin · 2013 · ‎Medicaltransabdominal endoscopy was undertaken to evaluate and treat GI bleeding from the remnant stomach or duodenal bulb, for example, the placement of a .Clinical Gastrointestinal Endoscopy: A Comprehensive Atlas. Hoon Jai Chun, ‎Suk-Kyun Yang, ‎Myung-Gyu Choi · 2014 · ‎Medical16.46 Duodenal involvement of the mantle cell lymphoma. Some hyperemic patches were scattered in the duodenal bulb. In the closeup picture, the surface of .Atlas of Clinical Gastrointestinal Endoscopy E-Book. Charles Melbern Wilcox, ‎Miguel Munoz-Navas, ‎Joseph Jy Sung · 2012 · ‎MedicalA B C D E FIGURE 4.32 MASS-LIKE DUODENAL ULCER WITH CLOT A, Mass effect in the posterior duodenum . Large ulcer in the anterior wall of the duodenal bulb.Cumulated Index Medicus. 1992 · ‎MedicineEndoscopic appearances in gastritis / duodenitis . Tytgat GN . . Endoscopy 1991 Jul ; 23 ( 4 ) : 234-6 Endoscopic orientation within the duodenal bulb .