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. 2023 Mar 7;47(2):322–328. doi: 10.1097/RCT.0000000000001400

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Copyright © 2023 The Author(s). Published by Wolters Kluwer Health, Inc.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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A 1-year-old girl with pilocytic astrocytoma (World Health Organization grade 1) in the right basal ganglia region (white arrow). A, Axial T1 fluid-attenuated inversion recovery image reveals a low signal intensity. B, Axial contrast-enhanced T1-weighted image displays prominent enhancement. C, Axial diffusion-weighted image shows a low signal intensity. D, The axial apparent diffusion coefficient (ADC) map delineates high ADC values. E and F, Color graph showing results of pathological staining. E, Hematoxylin-eosin staining presents a biphasic architectural pattern with dense and loose areas, consisting of multipolar cells with round to spindled nuclei and Rosenthal fibers (×400 magnification). F, The Ki-67 proliferation index is low, with approximately 5% of tumor cells staining positive (×400 magnification). Figure 2 can be viewed online in color at www.jcat.org.