Cortical-Sulcal Hyperintensity in Fluid-attenuated Inversion Recovery Images and Postoperative Transient Neurological Events after Indirect Revascularization Surgery for Moyamoya Disease

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  • ARAKI Yoshio
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • OKAMOTO Sho
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • YOKOYAMA Kinya
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • OTA Shinji
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • UDA Kenji
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • MURAOKA Shinsuke
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • KANAMORI Fumiaki
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • NISHIHORI Masahiro
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • IZUMI Takashi
    Department of Neurosurgery, Nagoya University Graduate School of Medicine
  • WAKABAYASHI Toshihiko
    Department of Neurosurgery, Nagoya University Graduate School of Medicine

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  • もやもや病に対する間接血行再建術後における皮質および脳溝内のFLAIR高信号と術後一過性神経脱落症状との関連

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Transient neurological events (TNEs) are relatively common phenomena after superficial temporal artery-middle cerebral artery (STA-MCA) bypass for the surgical treatment of moyamoya disease. Cortical-sulcal hyperintensity (CSHI) signs in magnetic resonance imaging (MRI) fluid-attenuated inversion recovery (FLAIR) images during the acute stage after the surgery have also been reported. These symptoms and radiological findings are reportedly correlated; however, few studies have examined these characteristics after indirect vascularization surgery. Therefore, here we retrospectively investigated the incidence and correlation of this issue. The CSHI signs were observed in 10 of 16 hemispheres (62.5%), and TNEs after the surgery were recognized in nine (56.3%). This correlation was statistically significant (p = 0.01). Our findings indicate that CSHI signs are associated with direct and indirect bypass surgery and may be closely related to postoperative TNEs.

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