充実性および主に充実性の甲状腺結節の長期超音波サーベイランスにより、2つの異なる吸収パターンが明らかに
Yan Hu1, Wei Zhou1,2, Shangyan Xu1
1Department of Ultrasound, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China, shsmu.edu.cn.
Radiology research and practice
|January 23, 2026
まとめ
良性の甲状腺結節は時間とともに大幅に縮小する可能性があり、急速な吸収を示すものと徐々に減少するものがあります。充実性結節におけるこの体積減少現象は、長期サーベイランスにおいて重要です。
科学分野:
- 内分泌学
- 放射線学
- 腫瘍学
背景:
- 甲状腺結節は一般的であり、サーベイランス中のその挙動を理解する必要がある。
- 充実性および主に充実性の結節は、超音波検査で頻繁に監視される。
- 吸収現象は、通常、嚢胞性結節で見られるが、充実性結節ではあまり特徴づけられていない。
研究 の 目的:
- 良性充実性および主に充実性の甲状腺結節における長期超音波サーベイランス中の体積減少を特徴づけること。
- これらの結節における経時的な明確な吸収パターンの記述。
- 異なる体積変化パターン間の臨床的および超音波的特徴の比較。
主な方法:
- 32人の患者からの34の充実性/主に充実性の甲状腺結節の後ろ向き研究。
- 中央値28ヶ月にわたる縦断的超音波サーベイランス。
- 体積変化軌跡を分析するための一般化加法混合モデル(GAMM)および教師なしクラスタリング。
主要な成果:
- 全ての結節で有意な体積減少(中央値減少率:85.6%)が認められた。
- 急速吸収群と緩徐吸収群の2つのパターンが特定された。
- 緩徐吸収結節は下極に多く、ドップラー流を欠き、一部では経時的なエコー源性/硬さの変化が見られた。
結論:
- 充実性甲状腺結節は、嚢胞性結節と同様に、有意な体積減少を起こす可能性がある。
- 充実性結節におけるこの吸収現象は見過ごされている可能性がある。
- 多様な体積変化パターンの理解は、追跡調査中の結節の進化の解釈を改善する。
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