Papilla of Vater morphology as an influencing factor in successful cannulation during resident training in advanced endoscopy. A prospective clinical study.

Introduction And Aim: Endoscopic retrograde cholangiopancreatography (ERCP) is a complex procedure. Clinical guidelines assess competence in ERCP through a defined number of procedures, but multiple factors are involved. Our aim was to analyze the morphology of the papilla of Vater as an independent factor in selective common bile duct cannulation during resident training.

Multiple lymphomatous polyposis: rectal prolapse as an atypical presentation of the disease.

Multiple lymphomatous polyposis is a rare entity that can involve different types of both B-cell and T-cell lymphomas, including mantle cell lymphoma. A 57-year-old male patient is presented with prolapse of the rectal canal associated with data of lower digestive tract bleeding. A colonoscopy and subsequent upper endoscopy were performed with findings compatible with lymphomatous polyposis.

Accuracy of ASGE criteria for the prediction of choledocholithiasis.

Background/aims: Few studies have validated the performance of guidelines for the prediction of choledocholithiasis (CL). Our objective was to prospectively assess the accuracy of the American Society for Gastrointestinal Endoscopy (ASGE) guidelines for the identification of CL.

Methods: A two-year prospective evaluation of patients with suspected CL was performed.

[Clinical characteristics of acute pancreatitis in Mexico].

Background: Acute pancreatitis (AP) etiology and frequency vary in relation to geographic region.

Aims: To determine the etiology, frequency, and mortality of AP in a Mexican population.

Patients And Methods: We carried out a prospective study of first episode AP patients over a period of 6 years.

[Obscure gastrointestinal bleeding due to duodenal infiltration of a non-functioning pancreatic neuroendocrine tumor diagnosed by capsule endoscopy: a case report].

Non-functioning pancreatic neuroendocrine tumors (PNETs) are infrequent slow-growing, clinically-silent tumors. They are incidentally detected and some of them may present in advanced stages with local involvement of surrounding structures. The diagnostic accuracy of endoscopio ultrasound (EUS) and fine needle aspiration (FNA) biopsy is significantly lower in neuroendocrine tumors (46.