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"お前は,野獣か?"と聞くと - イクサゾミブ誘発がん治療に関連する心臓機能障害の症例
Yusuke Hirao1, Kensuke Matsumoto1, Yu Mizutani1
1Department of Internal Medicine, Hyogo Prefectural Tamba Medical Center, Japan.
Internal medicine (Tokyo, Japan)
|February 23, 2026
まとめ
この症例報告は,多発性骨髄腫に対するイクサゾミブ治療による不可逆的ながん治療に関連する心機能障害 (CTRCD) を発症した81歳の男性を詳細に説明しています. 彼の左心室射出分数 (LVEF) は著しく低下し,珍しいが深刻な副作用を強調しました.
科学分野:
- 心臓病学 心臓病学
- 腫瘍学 腫瘍学
- 薬理学 薬理学とは
背景:
- 多発性骨髄腫は,血液学的悪性腫瘍である.
- がん治療に関連する心機能不全 (CTRCD) は,がん治療の既知の合併症である.
- イクサゾミブ (Ixazomib) は,多発性骨髄腫治療に使用されるプロテアソーム阻害剤です.
研究 の 目的:
- イクサゾミブ誘発の不可逆的ながん治療関連の心臓機能不全 (CTRCD) の珍しい症例を報告する.
- イクサゾミブ療法に関連した左心室噴出分数 (LVEF) の有意な低下の可能性を強調する.
主な方法:
- マルチプル骨髄腫を患っている81歳の男性の症例報告です.
- 非補償性心不全 (HF) の臨床表現.
- 心臓の機能を評価し,他の原因を排除するために,エコーカーディオグラフィーとマルチモダル画像検査を行う.
主要な成果:
- この患者は,イクサゾミブ投与の13ヶ月後に,LVEFがベースラインから35%まで有意に低下した.
- イクサゾミブ誘発のCTRCDは,時系列的関係と画像検査の結果から強く疑われていた.
- LVEFは,イクサゾミブを中止し,ガイドラインに基づく医療療法にもかかわらず回復しませんでした.
結論:
- イクサゾミブは,めったに発生しないが深刻な有害事象である不可逆的なCTRCDを誘発する可能性があります.
- イクサゾミブを投与している患者,特に心血管疾患のリスク要因が既にある患者では,心臓の密切なモニタリングが不可欠です.
- このケースは,腫瘍学患者のCTRCDの認識と管理の重要性を強調しています.
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