Lídia Argüello

Learn More
BACKGROUND AND AIM The diagnosis of gastrointestinal stromal tumors (GISTs) has important prognostic and therapeutic implications. The specific diagnosis of GIST has to be based on immunocytochemistry. This study aimed to prospectively compare in a crossover manner the accuracy of endoscopic ultrasound (EUS)-guided fine-needle aspiration (EUS-FNA) and(More)
The natural history of hepatitis C virus (HCV) infection following liver transplantation and predictors of disease severity remain controversial. The aims of the study were to assess in a homogeneous population of 81 cyclosporine-based HCV-infected liver transplant recipients mostly infected with genotype 1b and undergoing strict protocol annual biopsies:(More)
BACKGROUND The growing demand for colonoscopies and inappropriate colonoscopies have become a significant problem for health care. OBJECTIVES To assess the appropriateness of colonoscopies and to analyze the association with some clinical and organizational factors. To compare the results of the European Panel of Appropriateness of Gastrointestinal(More)
Background:Colorectal cancer (CRC) is the second cause of cancer-related death in the Western world. Much of the CRC genetic risk remains unidentified and may be attributable to a large number of common, low-penetrance genetic variants. Genetic linkage studies in CRC families have reported additional association with regions 9q22–31, 3q21–24, 7q31, 11q, 14q(More)
OBJECTIVES The aim of this study was to determine the safety and effectiveness of extracorporeal shock wave lithotripsy (ESWL) in difficult bile duct stones resistant to endoscopic extraction. PATIENTS AND METHOD From January 1997 to February 2002, combined treatment with endoscopy and ESWL was used in 19 patients who had undergone unsuccessful endoscopic(More)
BACKGROUND Recurrence after surgery to treat Crohn's disease is frequent and unpredictable. The efficacy of postsurgery capsule endoscopy in detecting recurrence in patients with Crohn's disease is yet to be confirmed. OBJECTIVE To assess the safety, accuracy, and therapeutic impact of capsule endoscopy in these patients. DESIGN Crohn's disease(More)
On-demand therapy is effective for maintaining symptoms control in nonerosive gastroesophagealreflux disease (GERD). Our aim was to assess the clinical effectiveness of on-demand therapy witha proton pump inhibitor (PPI) in mild GERD (nonerosive and low-grade esophagitis), its impact onhealth-related quality of life (HRQoL), and the degree of patient(More)
OBJECTIVES To study the long- and short-term safety and efficacy of endoscopic treatment of pancreatitis and its complications in our environment. PATIENTS AND METHODS We performed a retrospective analysis of 43 patients with chronic pancreatitis, acute pancreatitis complicated with pseudocyst, and pancreatic fistula diagnosed by endoscopic retrograde(More)
BACKGROUND Trisomy 21 in humans and trisomy 16 in mice (a model of Down syndrome) are associated with increases in rates of depolarization and repolarization and decreases in duration of action potential of neurons, due to overexpressing protein subunits of Na(+) and K(+) channels in a gene dose-dependent manner. These chromosomes also have genes for(More)
The relationship between the diameter of the esophageal body and the clinical profile of the disease and response to treatment was analyzed in 151 patients with idiopathic achalasia by pneumatic dilation of the cardias. Of the 151 patients, 46 presented an esophageal diameter < or = 3 cm (group I), 78 a diameter > 3 cm up to a maximum of 5 cm (group II) and(More)