PMC9513456_01
CT of the head showed a right intraventricular solid and cystic mass lesion (A) with trapped temporal horn and periventricular edema (B).
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A non-contrast computed tomography (CT) revealed a right lateral ventricular mass lesion and TTH, as well as diffuse brain edema ( Figure 1 ).
Preoperative MRI. (A) Axial T2-weighted image. (B) Axial contrast MRI. (C) Coronal contrast MRI. (D) Sagittal contrast MRI. The tumor had a diameter of 50 mm in and located in the trigone region of the right lateral ventricle. MRI showed infiltrative, irregular borders, inhomogeneous contrast enhancement, and rim enhancement.
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The maximum diameter of the lesion was 5 cm ( Figure 2 ).
Initial head CT revealed a 1-cm round high-density lesion and punctate calcification in the center (A). T2-weighted MRI showed the regular tumor located in the body of right lateral ventricle (B). Axial and sagittal contrast MRI showed minimal enhancement (C, D).
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MRI when the patient visited our hospital 18 months ago. CT revealed a 1-cm round high-density lesion in the body of the right lateral ventricle and punctate calcification in the center. Minimal enhancement was observed on enhanced MRI ( Figure 3 ).
(A) Tumor cells with atypical nuclei. H&E, 400x. (B) Most tumor cells show positive staining. GFAP, 200x. (C) High proliferation index with approximately 20% of the tumor cells showing nuclear staining. Ki67 200x.
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Immunohistochemistry demonstrated strong positivity for glial fibrillary acidic protein (GFAP), negativity for IDH1, and Ki67 index of 20% ( Figure 4 ).