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- W4317211283 abstract "Molecular brain tumor classification using DNA methylation profiling has revealed that the methylation-class of pleomorphic xanthoastrocytoma (mcPXA) comprised a substantial portion of divergent initial diagnoses, which had been established based on histology alone. This study aimed to characterize the survival outcome in patients with mcPXAs-in light of the diverse selected treatment regimes.A retrospective cohort of adult mcPXAs were analyzed in regard to their progression-free survival following surgical resection and postoperative radiotherapy. Radiotherapy treatment plans were correlated with follow-up images to characterize the pattern of relapse. Treatment toxicities and molecular tumor characteristics were further analyzed.Divergent initial histological diagnoses were encountered in 40.7%. There was no significant difference in local progression-free (PFS) and overall survival (OS) following gross total or subtotal resection. Postoperative radiotherapy was completed in 81% (22/27) following surgical intervention. Local PFS was 54.4% (95% CI: 35.3-84.0%) and OS was 81.3% (95% CI: 63.8-100%) after 3 years following postoperative radiotherapy. Initial relapses post-radiotherapy were primarily located in the previous tumor location and/or the planning target volume (PTV) (12/13). All patients in our cohort demonstrated the prognostically favorable pTERT-wildtype mcPXA.Our study demonstrated that adult patients with mcPXAs display a worse progression-free survival compared to the reported WHO grade 2 PXAs. Future matched-pair analyses are required with a non-irradiated cohort to elucidate the benefit of postoperative radiotherapy in adult patients with mcPXAs." @default.
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- W4317211283 date "2023-01-18" @default.
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- W4317211283 title "Clinical outcome following surgical resection and radiotherapy in adult patients with pleomorphic xanthoastrocytoma as defined by DNA methylation profiling" @default.
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- W4317211283 doi "https://doi.org/10.1093/nop/npad004" @default.
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