A 64-Year-Old Man Is Being Evaluated for Nausea and a New-Onset

A 64-year-old man is being evaluated for nausea and a new-onset headache that worsens when he bends over.  Brain imaging shows a hemispheric cerebral mass that is subsequently biopsied.  Light microscopy of the tissue specimen is shown in the image below. 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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