RESUMO
From 1981 to 1991, fifty-three patients with primary gastric lymphoma were referred to our Institute and submitted to a complete pathologic staging followed by gastric resection, i.e., total or partial gastrectomy. According to the Working Formulation criteria, 14 patients (26.4%) were affected with high grade lymphomas, 22 (41.5%) with intermediate lymphomas and 17 (32.1%) with low grade lymphomas. MALT (mucosa associated lymphoid tissue) lymphomas were observed in > 50% of cases. At the pathologic examination of the surgical specimens, infiltration depth was assessed, according to TNM criteria, in the patients whose disease was limited to the muscular gastric wall (T1-T2) and in those whose disease spread to the serosa or beyond it (T3-T4). Twenty-five patients were classified as stage I and 28 as stage II (9 of them in stage II E1 and 19 in stage II E2 according to Musshoff's classification). The treatment protocol of these patients was as follows: stage I patients (T1-T2) with normal surgical resection margins underwent no adjuvant treatment (10 patients); stage I patients (T1-T2) with resection margins infiltrated by the disease were submitted to local irradiation; stage I (T3-T4) and stage II E1 patients underwent large-field postoperative irradiation (14 patients); stage II E2 patients (n = 19) received conventional chemotherapy (CHOP, F-CVP, N-CVP): the ones who failed to reach complete remission or presented with bulky disease at diagnosis completed the treatment with large-field irradiation (10 patients). The disease-free survival (86.5%) and the overall survival (96%) rates of stage I patients exhibited no significant difference relative to stage II patients (DFS: 87% and OS: 90%). The analysis of relapses relative to disease extent demonstrated that this parameter is more significant to prognosis than nodal involvement (T1-T2: 2/39 relapses, 5.1%; T3-T4: 4/14 relapses, 28.6%).
