MRI changes associated with vigabatrin treatment mimicking tumor progression.

Vigabatrin has been used as first-line treatment of infantile spasms. Reversible cerebral MRI signal changes have been reported to be associated with vigabatrin treatments. We report a case of a 5-month-old female who, following resection of an anaplastic oligodendroglioma developed, while treated with vigabatrin for seizures, abnormal DWI and FLAIR MRI signal changes worrisome for tumor progression or recurrence. Discontinuation of vigabatrin led to reversal of the MRI changes. This report highlights the fact that vigabatrin treatment can mimic tumor progression on MRI and confound management of tumors associated with seizures in pediatric patients.