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Washington University Experience | NEOPLASMS (MENINGIOMA) | Angiomatous | 14J Meningioma, EMA negative (Case 14) Trichrome 1
A trichrome stain illustrates the fibrous vascular walls. ---- Ancillary data (not shown): Ki-67 (MIB-1 antibody) highlights a proliferation index up to 12.8% in the tumor cells. ---- Comment: The histopathological and immunohistochemical findings are consistent with atypical meningioma, WHO grade II.
