Ependymoma classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Ahmad Al Maradni, M.D. [2]

Overview

Ependymoma may be classified according to the WHO into 3 grades: grades I, II, and III.

Classification

Ependymoma may be classified according to the WHO into 3 grades:

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