PMC9489938_01
(A) Magnetic resonance image (MRI) image showing isointensity occupancy in T2 series with a clear border compared to the brain tissue (red arrowhead), surrounded by edema (yellow arrowhead). (B) Enhanced series showing the falx (red arrowhead). (C) Lesion with fair enhancement under the right temple bone. (D) CBV showing that the skull base area has more but not fair blood volume.
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F1
T1 and T2. The enhanced MRI report showed an unbalanced enhancement of the occupancy; the center of the occupancy was not enhanced (Figures 1-3). Perfusion weighted imaging shows that the occupancy has the feature of increased cerebral blood flow and cerebral blood volume (CBV) and delated mean transit time and time to peak (Figure 1).
Digital subtraction angiography showing three aneurysms' size and location.
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F2
T1 and T2. The enhanced MRI report showed an unbalanced enhancement of the occupancy; the center of the occupancy was not enhanced (Figures 1-3). The result shows that three aneurysms are located in the ACOA and R-ACA (A2 + A3) (Figure 2).
Histology of the meningiomas, showing psammoma bodies (yellow arrowhead) and calcification (read arrowhead) in both falx and skull base meningiomas.
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F3
T1 and T2. The enhanced MRI report showed an unbalanced enhancement of the occupancy; the center of the occupancy was not enhanced (Figures 1-3). The histologies of the skull base and falx occupancy were both reported to be endothelial meningiomas (Figure 3).