Evaluation of the Tumor-brain Interface of Intracranial Meningiomas on MR Imaging including FLAIR Images

• TAKEGUCHI Takashi

  Department of Radiology, Ehime University School of Medicine

• MIKI Hitoshi

  Department of Radiology, Ehime University School of Medicine

• SHIMIZU Teruhiko

  Department of Radiology, Ehime University School of Medicine

• KIKUCHI Keiichi

  Department of Radiology, Ehime University School of Medicine

• MOCHIZUKI Teruhito

  Department of Radiology, Ehime University School of Medicine

• OHUE Shiro

  Department of Neurosurgery, Ehime University School of Medicine

• OHNISHI Takanori

  Department of Neurosurgery, Ehime University School of Medicine

抄録

Purpose: The usefulness of fluid-attenuated inversion recovery (FLAIR) imaging for the evaluation of brain diseases has been reported. The purpose of this study was to evaluate the brain-meningioma interface with MRI including FLAIR imaging.<br> Materials and methods: This study involved 48 patients with 50 intracranial meningiomas. We retrospectively evaluated the brain-meningioma interface by various imaging method including FLAIR. If a thin layer with a signal intensity different from that of the tumor and brain was observed in the areas of the tumor-brain interface in T₁-weighted IR (T₁WIR) and T₂-weighted turbo SE (T₂WTSE) images, we defined this structure as the rim. The presence or absence of the rim and the signal intensity were evaluated, and the length and the signal intensity of the rim observed with FLAIR and contrast-enhanced T₁WIR (CE-T₁WIR) images were evaluated.<br> Results: In 35 of the 50 lesions (70.0%), the rim was observed in the tumor-brain interface as a layer of low signal intensity in T₁WIR images and high signal intensity in T₂WTSE images. In 13 lesions (26.0%), no rim was detected. Flow voids were observed at the tumor-brain interface in 20 of the 50 lesions (40.0%). No rim showed a low signal intensity of the tumor-brain interface in both T₁WIR and T₂WTSE images. The rim exhibited an iso-to-high signal intensity compared to the tumor parenchyma in FLAIR images and an enhanced signal intensity in CE-T₁WIR images. In contrast to T₁WIR images, the rim in FLAIR images tended to be identified across the entire circumference.<br> Conclusion: The rim at the brain-meningioma interface revealed as low signal intensity in T₁WIR images and high signal intensity in T₂WTSE images, which was conventionally considered to be the CSF cleft, was often revealed in FLAIR images as high signal intensity compared to the tumor parenchyma, and an enhanced signal intensity in CE-T₁WIR images. Therefore, the presence of CSF in such rims is unlikely, and the rims might reflect the capsule structure of the tumor surface.<br>

収録刊行物

• Magnetic Resonance in Medical Sciences

  Magnetic Resonance in Medical Sciences 2 (4), 165-169, 2003

  日本磁気共鳴医学会

キーワード

• magnetic resonance imaging (MRI)
• fluid-attenuated inversion recovery (FLAIR)
• meningioma
• tumor-brain interface
• CSF cleft

詳細情報

• CRID: 1390282680171995008
• NII論文ID: 10012729832
• NII論文ID: 30019528370
• NII書誌ID: AA11648770
• DOI: 10.2463/mrms.2.165
• ISSN: 18802206
• ISSN: 13473182
• Web Site: https://www.jstage.jst.go.jp/article/mrms/2/4/2_4_165/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2005215522
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可