Ependymoma classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
WHO classifies Ependymoma into three grades based on pleomorphism, mitotic count, cellularity, vascular proliferation, invasion.
Classification
WHO Grade I
- Myxopapillary Ependymomas
- Subependymomas
WHO Grade II
- Cellular Ependymoma
- Papillary Ependymoma
- Clear cell Ependymoma
Grade III
- Anaplastic Ependymoma
- Features include
- Increased cellularity and increased mitotic activity
- Microvascular proliferation
- Necrosis