The patient went on to have a stereotactic biopsy.
Paraffin sections show cores of a densely cellular glial tumor. Tumor cells have fibn'llary astrocytic morphology, show moderate nuclear and cellular pleomorphism and are arranged in diffuse sheets. Moderate numbers of mitotic figures are identified (5 in 10 HPF). There is no multilayering of atypical cells around vessel Iumena and no necrosis is identified.