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Washington University Experience | NEOPLASMS (MENINGIOMA) | Secretory | 7G Meningioma, secretory (Case 7) MIB 2
Ki67 immunoreactivity is high (up to 21%) and is concerning for the possibility of an even more aggressive biology. Necrosis is not present. ---- Comment: Based on the WHO criteria of >4/10hpf mitoses as a designation of atypical meningioma, WHO Grade 2 this tumor qualifies.
