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Washington University Experience | NEOPLASMS (GLIAL) | Ependymoma - Microscopic | 2E Ependymoma (Case 2) CD99 1
A CD99 immunostain shows a diffuse membrane pattern in the tumor cells and their delicate processes. (CD99 IHC) ---- Not shown: The Ki-67 proliferation index is low. ---- The morphologic features and immunohistochemical staining profile are consistent with an ependymoma, WHO grade 2.
