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The cortical high-flow sign of oligodendroglioma, IDH-mutant and 1p/19q-codeleted: comparison between arterial spin labeling and dynamic susceptibility contrast methods

  • Diagnostic Neuroradiology
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Abstract

Purpose

The cortical high-flow sign with the non-enhancing area was reportedly found to be more frequent with oligodendroglioma, IDH-mutant and 1p/19q codeleted (ODG IDHm-codel) than with IDH-wildtype or astrocytoma, IDH-mutant on arterial spin labeling (ASL) in diffuse gliomas. This study aimed to compare the identification rate of the cortical high-flow sign on ASL in patients with ODG IDHm-codel to that on dynamic susceptibility contrast-enhanced perfusion-weighted imaging (DSC-PWI).

Methods

Participants consisted of 32 adult ODG IDHm-codel patients with pathologically confirmed. Subtraction images were generated from paired control and label images on ASL. For DSC, dynamic T2*-weighted perfusion weighted images were obtained after pre-bolus of gadolinium-based contrast agent. Regional cerebral blood flow/volume maps were generated based on the concentration–time curve and arterial input function. Tumor-affecting cortices without contrast enhancement on conventional MR imaging were targeted. The identification rate of the cortical high-flow sign was compared between ASL and DSC using the Pearson’s Chi-Square test.

Results

Frequency of the cortical high-flow sign was significantly higher on ASL (18/32, 56.3%; p < 0.001) than on DSC (5/32, 15.6%). All cases with the positive cortical high-flow sign on DSC were identified on ASL.

Conclusion

ASL effectively identifies the cortical high-flow sign in ODG IDHm-codel, surpassing DSC in identification rates.

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Abbreviations

ASL:

Arterial spin labeling

DSC:

Dynamic susceptibility contrast-enhanced

IDH :

isocitrate dehydrogenase

ODG IDHm-codel :

Oligodendroglioma, IDH-mutant and 1p/19q-codeleted

PCR:

Polymerase chain reaction

PWI:

Perfusion-weighted imaging

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Funding

This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant number 22K07657.

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Correspondence to Koji Yamashita.

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Conflict of interest

K Yamashita, OT, KK, DK, YS, YF, K Yoshimoto, and KI: Nothing to disclose.

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This study was approved by the institutional review board of our hospital (Kyushu University Institutional Review Board for Clinical Research).

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Informed consent was waived because this study was retrospective nature.

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Yamashita, K., Togao, O., Kikuchi, K. et al. The cortical high-flow sign of oligodendroglioma, IDH-mutant and 1p/19q-codeleted: comparison between arterial spin labeling and dynamic susceptibility contrast methods. Neuroradiology 66, 187–192 (2024). https://doi.org/10.1007/s00234-023-03267-x

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