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Washington University Experience | NEOPLASMS (GLIAL) | Pleomorphic Xanthoastrocytoma (PXA) | 1H Pleomorphic Xanthoastrocytoma (Case 1) Ki67

Immunostaining for Ki67 is quite variable but demonstrates a proliferation rate of up to 3.7%. ---- Ancillary data (not shown): BRAF V600E mutation was detected by FISH. ---- The morphological and immunohistochemical features of this tumor are most consistent with those of a pleomorphic xanthoastrocytoma (WHO Grade 2).

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