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炎症性虫垂を超えて:低異型度虫垂粘液性腫瘍 - 肉眼的所見に焦点を当てる
Berkenye Csonka1, Ádám Ferenczi1, Anita Sejben1
1Department of Pathology, University of Szeged, 6725 Szeged, Hungary.
Diagnostics (Basel, Switzerland)
|January 28, 2026
まとめ
低異型度虫垂粘液性腫瘍(LAMN)は虫垂炎に似ている可能性がありますが、腹膜偽粘液腫につながる可能性があります。この症例は、腹膜播種を早期に検出するための診断の課題と注意深い検査の重要性を強調しています。
科学分野:
- 消化器病学
- 外科病理学
- 腫瘍学
背景:
- 低異型度虫垂粘液性腫瘍(LAMN)はまれな上皮性腫瘍です。
- LAMNは急性虫垂炎と同様の症状を呈することがよくあります。
- 腹膜偽粘液腫への進行は、長期的な罹患率を著しく引き起こす可能性があります。
研究 の 目的:
- 予期せぬ進行を伴うLAMNの症例を報告すること。
- LAMNに関連する診断上の課題を強調すること。
- 腹膜播種を検出する上で肉眼的検査と組織学的分析の重要性を強調すること。
主な方法:
- 腹部の痛み、吐き気、発熱を呈した51歳男性の症例報告。
- 診断ワークアップには腹部超音波検査と虫垂切除術が含まれていました。
- 組織学的検査と術後の再手術が実施されました。
主要な成果:
- 臨床所見は急性虫垂炎を示唆していましたが、超音波検査で虫垂の嚢胞性拡張が明らかになりました。
- 虫垂切除術では、粘液性滲出物と虫垂外播種を伴う嚢胞性、真珠光沢のある虫垂が示されました。
- 術後の再手術で腹膜偽粘液腫が確認されました。
結論:
- LAMNは診断上の課題を提示し、急性虫垂炎を模倣することがよくあります。
- 診断には、綿密な肉眼的検査と完全な組織学的包埋が不可欠です。
- 微妙な肉眼的所見は、重要な腹膜播種を示唆する可能性があり、迅速な管理が必要です。
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