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Primary extranodal lymphomas of stomach: clinical presentation, diagnostic pitfalls and management Psyrri A; Papageorgiou S; Economopoulos TAnn Oncol 2008[Dec]; 19 (12): 1992-9Gastrointestinal lymphoma is the most common form of extranodal lymphoma, accounting for 30%-40% of cases. The most commonly involved site is the stomach (60%-75% of cases), followed by the small bowel, ileum, cecum, colon and rectum. The most common histological subtypes are diffuse large B-cell lymphoma (DLBCL) and marginal zone B-cell lymphoma of the mucosa-associated lymphoid tissue (MALT). Helicobacter pylori infection has been implicated in the pathogenesis of MALT gastric lymphoma, but its role in gastric diffuse large B-cell non-Hodgkin's lymphoma (NHL) is controversial. The therapeutic approach for patients with gastric NHL has been revised over the last 10 years. Conservative treatment with anthracycline-based chemotherapy alone or in combination with involved-field radiotherapy has replaced gastrectomy as standard therapy in cases with DLBCL. Additionally, MALT lymphomas are mainly treated with antibiotics alone, which can induce lasting remissions in those cases associated with H. pylori infection. Nevertheless, various therapeutic aspects for primary gastric lymphomas are still controversial and several questions remain unanswered. Among others, the role of rituximab, consolidation radiotherapy as well as H. pylori eradication in histological aggressive subtypes warrants better clarification.|Helicobacter Infections/complications/pathology[MESH]|Helicobacter pylori[MESH]|Humans[MESH]|Lymphoma/*diagnosis/*therapy[MESH]|Neoplasm Staging[MESH]|Stomach Neoplasms/*diagnosis/microbiology/*therapy[MESH] |