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要旨 限局性胃MALTリンパ腫76例の臨床経過を調査し(平均経過観察期間44.4か月),Helicobacter pylori(H. pylori)除菌治療の成績と除菌治療抵抗例の臨床的特徴およびその対策について検討した.H. pylori陽性胃MALTリンパ腫49例のうち,除菌治療のみで治癒した症例は38例(77.6%)であった.一方,H. pylori陰性例13例に対しても除菌療法を試みたが,治癒した症例はなく(77.6% vs 0%,p<0.001),除菌治療抵抗例の臨床的特徴として"H. pylori陰性"が挙げられる.H. pylori陽性胃MALTリンパ腫における除菌治療有効例と抵抗例を比較すると,性,年齢,病期,病変の内視鏡所見,壁浸潤度,病変部位に有意な差を認めなかった.除菌治療抵抗例あるいはH. pylori陰性例30例のうち30Gy放射線療法で治癒した症例は29例中22例(75.9%)で,低容量放射線療法は"二次治療"として有用と考えられた.
To clarify the clinical features of gastric MALT lymphoma (GML) with persistent lymphoma after eradication therapy of Helicobacter pylori (H. pylori), and the outcome of long-time follow-up study after treatment against GML, seventy-six patients with localized GML were studied. The median follow-up period was 44.4 months. Thirty-eight of 49 patients (77.6%) with H. pylori-positive GML had been cured of GML by antibiotic therapy alone. On the other hand, none of 13 patients with H. pylori-negative GML had been cured by antibiotic therapy (77.6%vs 0%, p<0.001). "H. pylori-negative" is one of the clinical features of antibiotic-resistant cases with GML. There was no significant difference in sex, age, stage, endoscopic finding, depth, and affected region between the two groups of cured and persistent GML with H. pylori infection. Twenty-two of 29 patients (75.6%) with antibiotic-resistant or H. pylori-negative cases of GML had been cured by 30 Gy radiation therapy. Low-dose radiation was thought to be a useful therapeutic procedure as a "second line treatment" of localized GML.
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