Important It is possible that the main title of the report Primary Gastric Lymphoma is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report. MALT gastric lymphoma is often associated with infection with the Helicobacter pylori bacterium. Within the medical literature, significant controversy exists regarding the exact definition, classification and staging of primary gastric lymphoma. The term lymphoma refers to cancer that arises in the lymphatic system. The specific symptoms (fever, night sweats, itchiness, etc.) and physical findings (weight loss, enlarged spleen, lumps over the neck or axilla, etc.) Primary gastric lymphoma is the most common form of extranodal NHL.