1.   These findings support the Isaacson classification system which separates two extreme groups of gastric lymphomas with different morphology, behaviour, and outcome.

2.   Gastrointestinal lymphoma is uncommon, but gastric lymphoma is the most frequent form and could be a good model for the evaluation of MALT tumour behaviour.

3.   In most series patients with primary gastric lymphoma have been classified according to Rappaport, Kiel, Lukes-Collins, or Working Formulation systems.

4.   If these results can be confirmed, chemotherapy without gastrectomy should be the treatment of choice for agressive gastric lymphomas.

5.   When the characteristics and the extent of the gastric MALT lymphoma are considered, only the histological grade and stage IV disease influenced mortality.