The patient went on to have a craniotomy and resection.
Histology
MICROSCOPIC DESCRIPTION:
The sections show a moderately hypercellular meningioma. This is intensely vascular and shows a mixture of meningothelial and microcystic architectures. Tumor cells show moderate nuclear and cellular pleomorphism. An occasional mitotic figure is identified (1/20HPF). No areas of necrosis are identified and there is no evidence of brain invasion. Dural attachment is noted.
FINAL DIAGNOSIS: microcystic meningioma