case_images: PMC5523508_01
case_images: Preoperative (a) and postoperative (b) T1-contrasted magnetic resonance imaging demonstrates nodular enhancement and subsequent complete resection of the nodule
case_images: SNI-8-140-g001.jpg
case_images: PMC5523508_01_SNI-8-140-g001.jpg
case_images: F1
case_images: Surveillance MRIs demonstrated progressive nodular enhancement of the lesion [Figure 1a]. The patient subsequently underwent gross total resection of the mass and adjacent seizure onset zone [Figure 1b].
case_images: Hematoxylin and eosin (H and E) stained sections from 1982 at x100 (a) show a round-cell glial lesion with microcystic features and myxoid change consistent with an oligodendroglioma. At x400 (b), there are neurons floating in mucinous pools, a distinctive feature of dysembryoplastic neuroepithelial tumor (DNET) that was not identified until 1988. H and E stained sections from 2013 show almost identical features, now widely recognized as characterizing a DNET (c, x100; d, x400)
case_images: SNI-8-140-g002.jpg
case_images: PMC5523508_01_SNI-8-140-g002.jpg
case_images: F2
case_images: Histopathological evaluation identified the characteristic features of DNET in both specimens [Figure 2].