[Bile duct obstruction due to non-Hodkin's lymphoma in patients with HIV infection].

Acquired immune deficiency syndrome increases the risk of developing non-Hodgkin's B-cell lymphoma (NHL) (relative risk over 100). NHL tend to be high-grade and to affect the central nervous system and digestive tract. Biliary tract compression is usually due to external compression from enlarged lymph nodes, but is not usually the first manifestation.

Attitude facing a patient suffering from Helicobacter pylori infection resistant to a triple therapy.

Even with the current most effective treatment regimens, about 10-20% of patients will fail to eradicate H. pylori infection. Therefore, in designing a treatment strategy we should not focus on the results of primary therapy alone, but also on the final (over-all) eradication rate.

[Comparison between two 13C-urea breath tests for the diagnosis of Helicobacter pylori infection: isotope ratio mass spectrometer versus infrared spectrometer].

Objectives: To compare the accuracy of the breath test using the isotope ratio mass spectrometer (IRMS) versus the nondispersive isotope-selective infrared spectrometer (NDIRS) in the diagnosis of Helicobacter pylori infection.

Method: Multicenter study in 4 Spanish hospitals. One group of dyspeptic patients who had not undergone prior eradication therapy and another group of patients with gastric ulcer or gastrointestinal bleeding due to gastroduodenal ulcer receiving H.

[Clinical and endoscopic prognostic factors in patients with bleeding peptic ulcer].

Background: The main objectives of this study were to review the clinic and endoscopic variables of patients with upper gastrointestinal bleeding (UGB) due to peptic gastroduodenal lesions who were evaluated in our hospital during one year, to identify the characteristics associated with a negative evolution of the UGB and to analyse the characteristics of those patients who were discharged immediately after the endoscopy was performed.

Patients And Method: A one-year retrospective analysis of all UGB episodes was performed. Patients having gastroduodenal ulcer or erosive gastritis/duodenitis at endoscopy were included.

[Helicobacter pylori infection and functional dyspepsia. Meta-analysis of efficacy of eradication therapy].

Background: To establish a causal link between Helicobacter pylori infection and functional dyspepsia it is necessary to demonstrate that H. pylori eradication induces an improvement in dyspeptic symptoms. Our aim was to perform a meta-analysis of randomized studies comparing, in functional dyspepsia, the efficacy of H.