case_images: PMC10405728_01
case_images: Comparison of preoperative and postoperative imaging. Preoperative enhanced MRI showed heterogeneous enhancement in the bilateral frontal-parietal with a size of 5.12x9.19x6.03cm; the adjacent brain tissue and ventricle were significantly compressed and there was obvious peritumoral edema (A-C). Postoperative cranial CT and MRI demonstrated tumor was partially resected (D-F).
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case_images: T1 and long T2 signal shadows in the bilateral frontal-parietal lobe; after enhancement, an uneven mass with a size of 5.12x9.19x6.03 cm was seen ( Figures 1A-C ). The adjacent brain tissue and ventricle were significantly compressed, and there was obvious peritumoral edema ( Figures 1A-C ). Postoperative imaging showed the tumor was partially removed ( Figures 1D-F ).
case_images: Preoperative MRI showed slight long T2 signal shadow in the frontal-parietal lobe; after enhancement, the lesion demonstrated heterogeneous enhancement with a size of 7.1x5.0x3.7(A-D). Preoperative cerebral angiography indicated that the bilateral middle meningeal artery mainly supplied the tumor (E); after the embolization, cerebral angiography showed that the bilateral middle meningeal artery no longer supplied blood to the tumor, and the tumor staining became weak (F). Postoperative MRI indicated the tumor was near-totally resected (G, H).
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case_images: Preoperative MRI showed equal T1 and slight long T2 signal shadow in the frontal-parietal lobe; after enhancement, the lesion demonstrated heterogeneous enhancement with a size of 7.1x5.0x3.7 cm ( Figures 2A-D ). Figure 2E ). First, embolization of the bilateral middle meningeal artery was performed under general anesthesia, and Onyx glue was injected into the bilateral middle meningeal artery through a microcatheter. Cerebral angiography showed that the bilateral middle meningeal artery no longer supplied blood to the tumor, and the tumor staining became weak ( Figure 2F ). Finally, postoperative imaging showed that the tumor was nearly completely removed ( Figures 2G, H ).
case_images: Preoperative enhanced MRI showed that the nodular enhancement was found in both sides of parietal cerebral falx, with the largest size of 3.4x1.8x3.6 cm (A-C). Postoperative MRI demonstrated the tumor was resected completely (D-F).
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case_images: After enhancement, the nodular enhancement was found in both sides of parietal cerebral falx, with the largest size of 3.4x1.8x3.6 cm ( Figures 3A-C ). The tumor was completely resected together with a thickened cerebral falx around the tumor ( Figures 3D-F ).
case_images: Histopathology results (A, 200xmagnification and B, 400xmagnification) showed the tumor cells were round and oval with visible nucleoli, mitotic figures were easy to be seen, and small focal necrosis could be seen. Thin-walled blood vessels could be observed in the stroma. Immunohistochemistry staining at 400x magnification showed that the tumor cells were positive for CD34 (C), STAT6 (D).
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case_images: Histopathology examination suggested anaplastic hemangiopericytoma (WHO grade III,  Figures 4A, B ), immunohistochemistry staining also showed that the tumor cells were positive for STAT6 and CD34 ( Figures 4C, D ).