case_images: PMC11152543_01
case_images: Computed tomography demonstrating the intraosseous mass lesion and bone erosion of the middle and lower clivus, extending laterally to the right occipital condyle (arrows).
case_images: SNI-15-177-g001.jpg
case_images: PMC11152543_01_SNI-15-177-g001.jpg
case_images: F1
case_images: Computed tomography (CT) showed an intraosseous mass lesion and bone erosion of the middle and lower clivus, extending laterally to the right occipital condyle [Figure 1].
case_images: (a) Magnetic resonance imaging showing hypointensity on T1-weighted imaging and (b) hyperintense components on T2-weighted imaging in the lesion. (c) After gadolinium administration, the tumor is markedly enhanced in a homogenous fashion. (d-k) The axial images show the tumor area. On the upper side, the tumor became markedly enhanced in a homogenous fashion. On the upper side, the tumor protrudes in the sphenoidal sinus.
case_images: SNI-15-177-g002.jpg
case_images: PMC11152543_01_SNI-15-177-g002.jpg
case_images: F2
case_images: T2-weighted and hypointense on T1-weighted images [Figure 2]. The lesion was larger than it had been on the first MRI study done 10 years earlier.
case_images: (a) Inside the sphenoid sinus, the protruding tumor (arrow) can be seen extending throughout the cortical bone. (b-d) Along the preserved cortical bone, the tumor was exfoliated and coagulated. (e) A single layer of flattened endothelial cells scattered amid bony trabeculae bordered the thin-walled vascular channels shown by pathological testing, which was consistent with an intraosseous cavernous hemangioma.
case_images: SNI-15-177-g003.jpg
case_images: PMC11152543_01_SNI-15-177-g003.jpg
case_images: F3
case_images: A protruding tumor was observed through the cortical bone [Figure 3a]. The cavities were opened with a drill, and the tumor was removed with the capsule preserved, and we did not encounter uncontrollable bleeding in that way [Figures 3b-d]. Pathological examination revealed an intraosseous cavernous hemangioma [Figure 3e].
case_images: (a) In the spoiled gradient recalled acquisition in the steady state-gradient refocused axial image and (b and c) T1-weighted magnetic resonance imaging using gadolinium-based contrast coronal and sagittal images, the residual tumor (arrows) can be seen in the central area of the clivus covered with the cortical bone.
case_images: SNI-15-177-g004.jpg
case_images: PMC11152543_01_SNI-15-177-g004.jpg
case_images: F4
case_images: POD9 with her neurological condition stable. Postoperative MRI [ Figure 4] revealed a residual tumor in the central area of the clivus covered with the cortical bone.