case_images: PMC10858785_01
case_images: Preoperative brain computed tomography scan and brain magnetic resonance imaging show a large, heterogeneous contrast-enhancing mass located in the right parieto-occipital region. This mass extended extra-axially, reaching up to the occipital horn medially and involving the cortical bone of the inner table laterally.
case_images: SNI-15-25-g001.jpg
case_images: PMC10858785_01_SNI-15-25-g001.jpg
case_images: F1
case_images: This mass extended extra-axially, reaching up to the occipital horn medially and involving the cortical bone of the inner table laterally, displaying signs of bone invasion [Figure 1].
case_images: The bone invasion and the en bloc resected tumor.
case_images: SNI-15-25-g002.jpg
case_images: PMC10858785_01_SNI-15-25-g002.jpg
case_images: F2
case_images: Intraoperatively, it was observed that the tumor had invaded and destroyed the surrounding bone [Figure 2].
case_images: Postoperative brain magnetic resonance imaging showing complete total resection.
case_images: SNI-15-25-g003.jpg
case_images: PMC10858785_01_SNI-15-25-g003.jpg
case_images: F3
case_images: (a) Relative cellular uniformity is apparent, as well as frequent mitotic figures. Note how many cells display haloes (b) glial fibrillary acidic protein staining is strongly positive within tumor cells.
case_images: SNI-15-25-g004.jpg
case_images: PMC10858785_01_SNI-15-25-g004.jpg
case_images: F4
case_images: IV), characterized by small cells with marked angiogenesis and wide necrotic areas infiltrating both cerebral structures and meningeal sheaths [Figure 4]. Immunohistochemical analysis revealed a Ki-67 labeling index of 40-45% for all cells within the resected tumor area.