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case_images: Non-contrast head CT. (A) Soft tissue window showing soft tissue density in the cavernous sinus area. (B) Bone window showing bone remodelling and thinning.
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case_images: Her CT brain (Figure 1) which revealed a mass adjacent to the right temporal pole, within the cavernous sinus, displaying soft tissue density with a CT value of 42 Hounsfield units (Hu).
case_images: Pre- and postcontrast brain MRI. (A) Hypointensity mass in the cavernous sinus area on TIWI. (B) Hyperintensity mass with uniform internal signal in the cavernous sinus area on T2WI. (C) Hyperintensity mass in the cavernous sinus area on T2 FLAIR. (D) The enhanced scan shows marked and even enhancement of the mass.
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case_images: Post-processed CBF map obtained from ASL. (A and B) A post-labeling delay(PLD) of 1.5 s (A) and a PLD of 2.5 s (B), and the measured CBF values were 203.36 (mL/100 g/min) and 186.26 (mL/100 g/min).
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case_images: The ASL image clearly demonstrates that the perfusion of the mass is considerably higher compared to the perfusion observed in the surrounding and contralateral cerebral cortex (Figure 3).
case_images: Hematoxylin-eosinstaining (HE)-stained histological section reveals an increased number of blood vessels with varying thickness.
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case_images: The postoperative pathological report revealed that the lumen was composed of numerous blood vessels, varying in size, with uneven thickness of the vessel walls (Figure 4).