ArticleJournal of Korean Neurosurgical Society2026
A Case Report of Deep-Seated Satellite Lesions in DNET : Is It a Tumor?
Article in Journal of Korean Neurosurgical Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Dysembryoplastic neuroepithelial tumor (DNET) is a benign, pediatric brain tumor characterized by focal seizures, often progressing to drug-resistant epilepsy. Satellite lesions (SLs), small lesions adjacent to the main tumor mass typically embedded within normal parenchyma, are identified in approximately 50% of DNET cases and may contribute to recurrent seizures if not totally removed. However, detailed histopathological descriptions of SL remain limited to date. We report on an 8-year-old boy with medically intractable seizures and a T2 hyperintense mass in the left frontal lobe with smaller deep-seated SLs. The lesions were near totally removed, with deep-seated SLs successfully removed by performing a wider resection including the adjacent normal white matter with the aid of intraoperative ultrasonography, rather than through direct visual inspection. Histological analysis of deep-seated SLs showed homogeneous, typical DNET features identical to the main mass, including glioneuronal columns with oligodendrocyte-like cells and floating neurons within a mucoid matrix, confirming that deep-seated SLs are true tumors. In order to reduce the risk of recurrence, maximal safe resection of deep-seated SLs with the aid of ultrasonography might be helpful.
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