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- W3128032951 abstract "<b><i>Purpose:</i></b> The T2-fluid-attenuated inversion recovery (FLAIR) mismatch sign was previously reported as a diagnostic indicator of diffuse astrocytoma, isocitrate dehydrogenase-mutant, and 1p/19q noncodeletion. Subsequently, it was reported that the same findings were observed in diffuse intrinsic pontine glioma (DIPG). We investigated the clinical significance of T2-FLAIR mismatch sign in DIPG. <b><i>Methods:</i></b> Twenty-one patients with DIPG (Male: Female = 12:9) were treated at our institute between 2004 and 2019. All patients were treated with local radiotherapy of 54 Gy/30 fractions. The positive T2-FLAIR mismatch sign was defined if it fulfilled the following criteria: (1) T2-FLAIR mismatch volume was >50% of T2 high volume at nonenhanced area, (2) the FLAIR low lesion is not associated with gadolinium enhancement (inside of enhancement or just outside of enhancement defined as edema), and (3) signal-intensity of FLAIR lowest lesion at tumor is lower than the normal cerebellar cortex. <b><i>Results:</i></b> In our patient series, T2-FLAIR mismatch sign was found in 5 out of 21 patients. Objective response rate of radiotherapy was 100% in patients positive for T2-FLAIR mismatch, while it was 25.0% in patients negative for T2-FLAIR mismatch, and this difference was statistically significant (<i>p</i> < 0.01, Fisher’s exact test). In patients under the age of 18-years, T2-FLAIR mismatch positive had a slightly better prognosis (<i>p</i> < 0.05, Wilcoxon test). <b><i>Conclusion:</i></b> T2-FLAIR mismatch sign in DIPG may be an indicator for better response to radiotherapy and a better prognostic factor." @default.
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- W3128032951 date "2021-01-01" @default.
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- W3128032951 title "T2-FLAIR Mismatch Sign and Response to Radiotherapy in Diffuse Intrinsic Pontine Glioma" @default.
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- W3128032951 doi "https://doi.org/10.1159/000513360" @default.
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