【臨床症状】40代 足痛
【問題】画像所見と診断名は?
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※脂肪抑制の横断像、T2WIの矢状断、脂肪抑制、T1WI、T2WIの冠状断の順に表示
➡ 造影後MRI画像
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※ 造影後の横断像、冠状断像の順に表示
▶答えはこちら
- 第3~4趾のMP関節付近にT1WIで筋肉と比較してやや高信号、T2WIでやや高信号の2cm大の結節病変を認める
- 造影後ではよくエンハンスされ、発生部位や臨床所見、画像所見からまずは、Morton病(Morton神経種)が疑われた
- その他、第5趾MP関節で関節包の若干の肥厚を認め関節炎が疑われる
【Morton病】
・Morton病は中足骨間の神経の変性と神経周囲の線維性肥厚を来す疾患(足底趾神経に生じた神経種)
・女性に多く、第3~4趾間が最多(75%)で次いで第2~3趾間(9%)に好発する
・前足部の痛みが特徴で知覚異常を示す場合もある
・関節リウマチとの関連性が指摘されている
骨軟部疾患の画像診断 第2版 を引用改変