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. 2023 Jan 2;82(3):250–260. doi: 10.1093/jnen/nlac123

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© The Author(s) 2023. Published by Oxford University Press on behalf of American Association of Neuropathologists, Inc.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 1. — DPedHGG with MYB::QKI fusion-positivity in a 11-year-old boy presenting with recurrent seizure. Initial MRI shows a well-defined, 3.6 cm × 3.0 cm × 2.4 cm (anteroposterior × transverse × craniocaudal) tumor in the left frontal lobe. The axial T2 FLAIR image shows high intensity with necrosis and restricted diffusion within the enhanced area. Follow-up MRI (pictures in the second layer) 19 months after the initial operation shows a newly developed nodule at the septum pellucidum. The nodule shows T2 hyperintensity on the axial T2 FLAIR image. A second operation was performed to resect the mass in the septum pellucidum. Postoperative MRI (pictures in the third layer) 3 months after the second operation (24 months after initial operation) shows recurrent tumors at the septum pellucidum and right lateral ventricular wall. The recurrent tumor’s imaging characteristics resemble the previous tumor at the septum pellucidum.