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  • Title: Long-term clinical outcome of Helicobacter pylori eradication for gastric mucosa-associated lymphoid tissue lymphoma with a reference to second-line treatment.
    Author: Nakamura S, Matsumoto T, Suekane H, Nakamura S, Matsumoto H, Esaki M, Yao T, Iida M.
    Journal: Cancer; 2005 Aug 01; 104(3):532-40. PubMed ID: 15937928.
    Abstract:
    BACKGROUND: The goals of the current study were to elucidate the long-term outcome of Helicobacter pylori eradication therapy for gastric mucosa-associated lymphoid tissue (MALT) lymphoma and to clarify the therapeutic efficacy of stomach-conserving treatments for patients not responding to eradication therapy. METHODS: Ninety-six patients with gastric MALT lymphoma, including 17 patients with areas of diffuse large B-cell lymphoma, were treated by H. pylori eradication. Patients not responding to eradication therapy underwent either a gastrectomy, multiagent chemotherapy, oral monochemotherapy (OMC), or radiotherapy (RT). Predictive factors for the response to eradication therapy, overall survival (OS), and event-free survival (EFS) were determined by the Kaplan-Meier analysis with the log-rank test. The efficacy of second-line treatment was compared between OMC and RT. RESULTS: After eradication therapy, 62 (65%) patients achieved complete disease remission (CR). Transient histologic disease recurrence was confirmed in 4 (6.5%) of 62 patients with CR during the follow-up (median, 37.5 months). The OS and EFS probabilities after 5 years were 0.96 and 0.80, respectively. Second-line treatment was performed in 31 patients; gastrectomy in 4 patients, multiagent chemotherapy in 5 patients, OMC in 12 patients, and RT in 10 patients. There were no differences in the CR rate, OS, EFS, or toxicity between the OMC and RT groups. CONCLUSIONS: H. pylori eradication therapy was an effective first-line treatment for patients with gastric MALT lymphoma, which led to a favorable long-term outcome. OMC and RT had an equivalent efficacy as a second-line treatment in nonresponding patients to eradication therapy.
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