Neurological Surgery 脳神経外科35巻3号

2007年03月発行

研究

三叉神経痛におけるneurovascular compression部位での新しい3D MR angiogram所見

著者： 佐藤透¹ 尾美賜¹ 大迫知香¹ 鍋島睦栄¹ 小野田惠介² 伊達勲²

所属機関： ¹医療法人社団）涼風会　佐藤脳神経外科脳神経外科 ²岡山大学大学院医歯薬学総合研究科神経病態外科学

ページ範囲：P.259 - P.265

Ⅰ．はじめに

　神経血管圧迫症候群の代表的疾患である三叉神経痛は，superior cerebellar artery（SCA），anterior inferior cerebellar artery（AICA），posterior inferior cerebellar artery（PICA）あるいはsuperior petrosal vein（SPV）などの圧迫責任血管により三叉神経root entry zone（REZ）が圧迫され発症する^4,5,9,17)．そのため，根治的治療としてmicrovascular decompression（MVD）が広く施行され良好な治療成績が報告されている^4,5,9,17)．

　三叉神経痛の画像診断には，magnetic resonance（MR）angiogramやMR cisternogramなどのMRIが使用される^{1-3,6-8,13-16)}．このなかで，3D time-of-flight，spoiled gradient-recalled（3D TOF SPGR）sequenceで撮像されたMR angiogramでは，血流によるinflow effectがMR信号強度に反映されるため，peak inflow velocityに関連した管腔内の血流情報が血管構造物として描出される^10,12)．今回，三叉神経痛症例において，neurovascular compression部位での3D MR angiogramを詳細に検討した結果，責任血管による圧迫部位や圧迫程度を画像評価するうえで有用な，新しい3D MR angiogram所見を得たので報告する．

参考文献

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