Arab Board Neurosurgery Final Written Practice Questions - Arab Board Neurosurgery Final Written Examination Exam

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An IDH-mutant diffuse astrocytoma without microvascular proliferation or necrosis demonstrates homozygous deletion of CDKN2A/CDKN2B on fluorescence in situ hybridization (FISH). According to WHO 2021 criteria, what is the assigned tumor grade?

CNS WHO Grade 2 CNS WHO Grade 3 CNS WHO Grade 4 CNS WHO Grade 1

Correct Answer:

CNS WHO Grade 4

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