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要約 目的:結膜MALTリンパ腫治療における抗体療法を含む初回治療について,後ろ向きに検討する。
対象と方法:2019〜2024年に関西医科大学附属病院および同総合医療センターで診療した結膜MALTリンパ腫20例25眼の各治療法における臨床経過を診療録に基づいて後ろ向きに検討した。
結果:症例の初診時年齢は68±16歳,性別は男性が7例,女性が13例,両眼性は5例,片眼性は15例であった。初回治療としてリツキシマブ全身投与(抗体療法)を行った6眼のうち3眼(50%)では効果不良であり,追加で放射線治療が行われていた。初回治療および追加治療として放射線治療を行った15眼のうち14眼(93%)では腫瘍の縮小を認めた。再発を認めた症例は1眼であり,放射線治療とともに抗体療法が追加され,腫瘍の縮小を認めた。無治療経過観察を行った4眼中4眼(100%)では腫瘍サイズは不変であった。また,病変を外科的に完全切除(以後,外科的切除)した3眼中3眼(100%)は再発しなかった。
結論:結膜MALTリンパ腫の初回治療では抗体療法の効果は限定的であった。一方,放射線治療や外科的切除の有効性が再確認され,重篤な副作用は認めなかった。また定期的なフォローを必要とするが,経過観察も治療の選択肢の一つと考えられた。治療選択においては,他科との情報共有のもとに十分な患者説明が重要である。
Abstract Purpose:To retrospectively evaluate the initial treatment approaches, including antibody therapy, for conjunctival mucosa-associated lymphoid tissue(MALT) lymphoma.
Subjects and Methods:The clinical course of 20 patients(25 eyes) diagnosed with conjunctival MALT lymphoma and treated at Kansai Medical University Hospital and its Medical Center between 2019 to 2024 using various treatment methods was retrospectively reviewed based on medical records.
Results:The mean age of the patients at the first visit was 68±16 years. Of the 20 patients, 7 were male and 13 were female, 5 cases were bilateral, while 15 were unilateral. Among the six eyes that initially received systemic rituximab(hereinafter referred to as antibody therapy), theree eyes(50%) demonstrated a poor response and subsequently required additional radiation therapy. In contrast, 14 of the 15 eyes(93%) treated with radiotherapy as either initial or additional treatment exhibited tumor shrinkage. One eye experienced recurrence, necessitating the assition of antibody therapy to radiotherapy, and exhibited tumor shrinkage. Tumoor size remained unchanged in all four eyes(100%) that underwent follow-up. Additionally, all the three eyes(100%) that underwent complete surgical resection exhibited tumor shrinkage.
Conclusions:Antibody therapy had limited efficacy as an initial treatment for conjunctival MALT lymphoma. In contrast, radiotherapy and total surgical resection was reaffirmed as effective, with no serious side effects observed. Although periodic follow-up is necessary, observation may also be a viable option. When selecting a treatment strategy, providing patients with sufficient explanations based on interdisciplinary information sharing with other departments.

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