A 64-Year-Old Guy Who Has Been Experiencing Nausea and a Headache

A 64-year-old guy who has been experiencing nausea and a headache that becomes worse when he leans over is now being assessed. A hemispheric cerebral mass is detected by brain imaging and is then biopsied. The picture below displays a tissue specimen under light microscopy. Which of the following histologic findings is most characteristic of this lesion?

A) Cyst formation and rare mitoses
B) Inflammatory cell infiltrate and reticulin deposits
C) Microscopic laminar calcium deposition
D) Necrosis and vascular proliferation
E) Proliferating cells surrounding blood vessels

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