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September 5, 2025Brain PathologyOpen Access

cIMPACT‐NOW update 11: Proposal on adaptation of diagnostic criteria for IDH‐ and H3‐wildtype diffuse high‐grade gliomas and for posterior fossa ependymal tumors

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Authors

PWPieter WesselingCalifornia Institute of Technology DCDavid CapperAstraZeneca (United Kingdom)GRGuido ReifenbergerGoethe University Frankfurt

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Implication

cIMPACT-NOW updates highlight diagnostic criteria for IDH- and H3-wildtype gliomas, suggesting clarity in posterior fossa ependymal tumor classification.

Key Points

Recommendations caution against assigning WHO grade 4 to histologically low-grade, IDH-wildtype tumors.
Evolving criteria for Diffuse pediatric-type high-grade gliomas focus on molecular features in younger patients.
Post-evaluation guidelines seek to clarify posterior fossa ependymal tumor classifications for improved diagnosis.
These updates aim to provide guidance ahead of the anticipated WHO CNS6 revision.

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Wesseling et al. (2025) studied this question.

synapsesocial.com/papers/68bb4d196d6d5674bcd00a33 https://doi.org/10.1111/bpa.70035

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Implication

cIMPACT-NOW updates highlight diagnostic criteria for IDH- and H3-wildtype gliomas, suggesting clarity in posterior fossa ependymal tumor classification.

cIMPACT‐NOW update 11: Proposal on adaptation of diagnostic criteria for IDH‐ and H3‐wildtype diffuse high‐grade gliomas and for posterior fossa ependymal tumors

Discussion

Member takes

Implication

Key Points

Cite This Study

cIMPACT‐NOW update 11: Proposal on adaptation of diagnostic criteria for IDH‐ and H3‐wildtype diffuse high‐grade gliomas and for posterior fossa ependymal tumors

Discussion

Member takes

Implication

Key Points

Cite This Study

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