Anaplastic Pleomorphic Xanthoastrocytoma: Morphological and Molecular Features of Three Cases

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Pleomorphic xanthoastrocytoma (PXA) is usually a low grade astrocytic tumor. However, some cases show significant mitotic activity (5 or more mitosis per 10 High Power Field) and/or necrosis. These tumors are described as pleomorphic xanthoastrocytomas wi
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