The patient went on to have an excision confirming the diagnosis. 

Histology

MICROSCOPIC DESCRIPTION: Sections show a moderately cellular meningothelial meningioma composed of whorled nests of tumor cells containing abundant cytoplasm, bland oval nuclei and inconspicuous nucleoli. No mitoses or necrosis are seen. No brain tissue is included. No atypical or malignant features are identified. Sections of decalcified bone show tumor infiltrating marrow space between bony trabuculae which focally extend to involve an inked radial excision margin.

FINAL DIAGNOSIS: Meningioma, WHO grade 1, with tumor bone invasion focally involving the inked radial excision margin.