Gastrointestinal lymphomas have attracted increasing interest over the past few years and are a topic characterized by intensive and ongoing activity. Insights into their pathogenesis and biological behavior have expanded impressively. However, this increased understanding has also raised many new questions. Experts from all over the world came together to exchange their experiences and to discuss new concepts at an international symposium in W?rzburg, Germany, in 1998. This book summarizes the presentations.Gastrointestinal lymphomas have attracted increasing interest over the past few years and are a topic characterized by intensive and ongoing activity. Insights into their pathogenesis and biological behavior have expanded impressively. However, this increased understanding has also raised many new questions. Experts from all over the world came together to exchange their experiences and to discuss new concepts at an international symposium in W?rzburg, Germany, in 1998. This book summarizes the presentations.I. Basics, Histomorphology and Molecular Biology.- Epidemiology and Prognostic Aspects of Gastric Malt-Lymphoma.- Helicobacter pylori in Gastric Mucosa-Associated Lymphoid Tissue Type Lymphoma.- Tumor Biology of Mucosa-Associated Lymphoid Tissue Lymphomas.- Histological Grading with Clinical Relevance in Gastric Mucosa-Associated Lymphoid Tissue (MALT) Lymphoma.- Pathology of Intestinal Lymphomas.- Gastric Mucosa-Associated Lymphoid Tissue Lymphoma: Implications of Animal Models on Pathogenic and Therapeutic Considerations Mouse Models of Gastric Lymphoma.- II. State-of-the-Art.- Vaccination Against Helicobacter pylori.- III. Clinical Aspects.- Primary Gastric Non-Hodgkins Lymphoma: Requirements for Diagnosis and Staging.- Gastric Lymphomas: Aspects of Follow-Up and After-Care.- Positron Emission Tomography for Detection and Staging of Malignant Lymphoma.- IV. Therapy.- Gastrointestinal Lymphomas The Dutch Experience.- Gastrointestinal Lymphomas: The FrlSÑ