Abstract
Pleomorphic xanthoastrocytoma (PXA) is classified by the World Health Organization as a grade II astrocytic tumor with relatively favorable prognosis among gliomas. A valine-to-glutamic acid substitution at position 600 of the serine/threonine-protein kinase BRAF (BRAF V600E) mutation, which is commonly found in PXA, has recently been detected in approximately 50 % of all epithelioid glioblastoma (GBM) cases. We herein report a case of epithelioid GBM developing at the site of a left temporal PXA 13 years after the treatment of the primary tumor. The BRAF V600E mutation was detected in both tumors. These findings suggest that epithelioid GBM may arise from a PXA with a BRAF V600E mutation.
Abbreviations
- BRAF V600E:
-
A valine-to-glutamic acid substitution at position 600 of the serine/threonine-protein kinase BRAF
- EMA:
-
Epithelial membrane antigen
- GFAP:
-
Glial fibrillary acidic protein
- GBM:
-
Glioblastoma
- Gd:
-
Gadolinium
- MRI:
-
Magnetic resonance imaging
- PXA:
-
Pleomorphic xanthoastrocytoma
- WHO:
-
World Health Organization
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Acknowledgments
The authors are grateful to Erika Komura and Akiko Imamura for help with preparation of the slides and immunohistochemistry.
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Tanaka, S., Nakada, M., Nobusawa, S. et al. Epithelioid glioblastoma arising from pleomorphic xanthoastrocytoma with the BRAF V600E mutation. Brain Tumor Pathol 31, 172–176 (2014). https://doi.org/10.1007/s10014-014-0192-2
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DOI: https://doi.org/10.1007/s10014-014-0192-2