Abstract
We report a rare case of epileptogenic glioma composed of glial progenitor cells that differentiated into an astrocytic and oligodendrocytic tumor. This 4-year-old girl presented with a 1-year history of complex partial seizure. MR scan showed a mass in the left temporal lobe with a cyst and a contrast-enhanced component. Subtotal resection of the tumor was achieved. Histological examination revealed that the tumor exhibited low cellularity composed of astrocytic and oligodendrocytic components, as well as low mitotic activity (MIB-1 = 1%). Immunohistochemical examination revealed GFAP positivity within the astrocytic cells, olig2 positivity within the oligodendrocytic cells, and S100 positivity in both cell types. MAP2 and CD34 were negative, and neurofilament was only positive in preexisting neurons. The pathological diagnosis was epileptogenic glioma (grade I) composed of glial progenitor cells. The postoperative course has been uneventful with good seizure control for 3 years.
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