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• W4282826812 abstract "Abstract Background We aimed to evaluate the mutation profile, transcriptional variants, and prognostic impact of the epidermal growth factor receptor ( EGFR ) gene in isocitrate dehydrogenase ( IDH )‐wildtype glioblastomas (GBMs). Methods We sequenced EGFR , evaluated the EGFR splicing profile using a next‐generation sequencing oncopanel, and analyzed the outcomes in 138 grade IV IDH ‐wildtype GBM cases. Results EGFR mutations were observed in 10% of GBMs. A total of 23.9% of the GBMs showed EGFR amplification. Moreover, 25% of the EGFR mutations occurred in the kinase domain. Notably, EGFR alterations were a predictor of good prognosis ( p = 0.035). GBM with EGFR alterations was associated with higher Karnofsky Performance Scale scores ( p = 0.014) and lower Ki‐67 scores ( p = 0.005) than GBM without EGFR alterations. EGFRvIII positivity was detected in 21% of EGFR ‐amplified GBMs. We identified two other EGFR variants in GBM cases with deletions of exons 6–7 (Δe 6–7) and exons 2–14 (Δe 2–14). In one case, the initial EGFRvIII mutation transformed into an EGFR Δe 2–14 mutation during recurrence. Conclusions We found that the EGFR gene profiles of GBM differ among cohorts and that EGFR alterations are good prognostic markers of overall survival in patients with IDH ‐wildtype GBM. Additionally, we identified rare EGFR variants with longitudinal and temporal transformations of EGFRvIII ." @default.
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• W4282826812 date "2022-06-13" @default.
• W4282826812 modified "2023-10-15" @default.
• W4282826812 title "Distribution and favorable prognostic implication of genomic <scp><i>EGFR</i></scp> alterations in <scp><i>IDH</i></scp>‐wildtype glioblastoma" @default.
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• W4282826812 doi "https://doi.org/10.1002/cam4.4939" @default.
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