[Current aspects of pathogenesis, diagnosis and therapy of primary MALT stomach lymphomas].

Primary gastrointestinal lymphoma of MALT occupy a special position which is documented in their own histological classification. Our knowledge about pathogenesis, biological and therapeutical behaviour of this lymphoma entity has increased substantially during recent years. Considering epidemiological, histomorphological and experimental data Helicobacter pylori infection undoubtless plays an important role in the development and progression of gastric MALT-lymphoma. In view of histological malignancy (low or high grade) and dissemination of the disease (stage) as decisive prognostic factors and therapeutical determinants endoscopic-bioptical diagnosis as well as endoscopic ultrasound are of major importance. In case of localized low-grade lymphoma eradication of Helicobacter pylori offers a promising therapeutic option. Surgical resection and radiochemotherapy have proven to be effective treatment modalities. There is a need for randomized trials to clarify if operative or conservative therapeutic strategies have to be favored in the future.