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Pathologic quiz case: a 46-year-old woman with a brain tumor.

A woman initially presented to our institution with sudden onset of headache, retro-orbital eye pain, nausea, and vomiting. Over the preceding several months, she suffered from ‘‘forgetfulness.’’ The patient’s past medical history was significant for a herniated disk and a tonsillectomy. Physical examination documented mild anisocoria and normal mini-mental status examination. Magnetic resonance imaging of the brain showed a 3.7 3 2.2 3 3.0-cm, lobulated, homogeneously enhancing, extra-axial mass in the right middle cranial fossa, abutting the greater wing of the sphenoid bone and invaginating into the right temporal lobe (Figure 1). Edema of the right temporal lobe, displacement of the right middle cerebral