atypical meningioma

(redirected from meningioma grade II)

atypical meningioma

A meningioma with a worse prognosis than typical meningiomas, which is characterised by cytologic atypia, increased cellularity, small cells with high nuclear:cytoplasmic ratios, prominent nucleoli, patternless or sheet-like growth, patchy necrosis, and ≥ 4 mitoses/10 HPFs.
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