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Figure 3: (a-d) Microscopy shows a cellular tumor with round to oval cells with indistinct cell outlines, minimal nuclear pleomorphism, delicate nuclear chromatin, inconspicuous nucleoli and eosinophilic cytoplasm. Cellular whorls are seen in the tumor. Fibrotic areas comprise cells with spindle-shaped nuclei. No mitosis or necrosis is present. Immunohistochemistry shows strong membrane positivity for epithelial membrane antigen (EMA) and cytoplasmic positivity for vimentin. CD34 is negative in tumor cells. The microscopic features are consistent with transitional meningioma (WHO Grade I) (x100)

Figure 3: (a-d) Microscopy shows a cellular tumor with round to oval cells with indistinct cell outlines, minimal nuclear pleomorphism, delicate nuclear chromatin, inconspicuous nucleoli and eosinophilic cytoplasm. Cellular whorls are seen in the tumor. Fibrotic areas comprise cells with spindle-shaped nuclei. No mitosis or necrosis is present. Immunohistochemistry shows strong membrane positivity for epithelial membrane antigen (EMA) and cytoplasmic positivity for vimentin. CD34 is negative in tumor cells. The microscopic features are consistent with transitional meningioma (WHO Grade I) (x100)