[Helicobacter pylori. Update 2002].

Helicobacter pylori infection has been recognized as the most important pathogenetic principal of peptic ulcer disease, atrophic gastritis, gastric adenocarcinoma and MALT lymphoma. At the moment efforts are made to clarify it's role in functional dyspepsia, and gastro-esophageal reflux disease. The complex interactions between H. pylori infection and NSAIDs is another field of ongoing research. Diagnosis and eradication therapy are standardized. Established indications are peptic ulcer disease, low-grade gastric MALT lymphoma, early gastric cancer treated by mucosal resection and partial gastrectomy for gastric cancer. Atrophic gastritis, known to be a precancerous lesion, as well as first degree relatives of patients with gastric cancer is another widely accepted indication for eradication therapy. The recommended eradication regimens combine a proton pump inhibitor with clarithromycin and either amoxicillin or metronidazole--for a week.