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MRI 3 months before admission. Axial T1- (A) and T2-weighted (B) magnetic resonance (MR) images show a mixed-intensity tumor. Axial T1-weighted (C) MRI with gadolinium revealing partial enhancement of the tumor.
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T2-weighted imaging revealed a mixed-intensity solid tumor, which was irregular upon enhanced gadolinium administration (Fig. 1).
Computed tomography on admission, showing intratumoral hemorrhage and intraventricular hemorrhage.
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Computed tomography (CT) revealed intratumoral hemorrhage with intraventricular hemorrhage in the anterior horn of the right ventricle (Fig. 2).
Intraoperative photo: Arrowhead: tumor, Arrow: anterior septal vein, White arrow: thalamostriate vein.
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The tumor, anterior septal vein, and thalamic vein were carefully dissected and removed because of adhesions (Fig. 3).
A: Photograph showing microcystic degeneration (H&E stain).
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B: Immunohistochemical staining revealed a positive reaction for glial fibrillary acidic protein.
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Histopathological findings via Hematoxylin and Eosin (H&E) staining showed small cells scattered in the glial substrate, with sparse cell density and microcystic degeneration (Fig. 4A). Immunohistochemical staining showed glial fibrillary acidic protein (+) (Fig. 4B), epithelial membrane antigen (-), Olg-2(-), and Ki-67(<1%).
Postoperative MRI with gadolinium showing total removal of the intraventricular tumor.
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Postoperative MRI showed total removal of the tumor (Fig. 5).