Glioblastoma in natalizumab-treated multiple sclerosis patients. 2017

Fabian Sierra Morales, and Robert B Wright, and Jorge E Novo, and Leonidas D Arvanitis, and Dusan Stefoski, and Igor J Koralnik
Section of Neuroinfectious diseases Rush University Medical Center Chicago Illinois.

We present two natalizumab-treated multiple sclerosis patients who developed glioblastoma multiforme (GBM) with variable outcomes. One patient had an isocitrate dehydrogenase (IDH)-wildtype GBM with aggressive behavior, who declined treatment and died 13 weeks after symptoms onset. The other patient underwent resection of an IDH-mutant secondary GBM that arose from a previously diagnosed grade II astrocytoma. He is still alive 5 years after the diagnosis of GBM. JC virus was not detected in either case. Whether natalizumab played a role in the development of GBM in those patients deserves further investigation.

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