case_images: PMC11105956_01
case_images: (a) Computed tomography angiography showed encasement of the right common carotid artery, right internal carotid artery, and right vertebral artery by the confluent hypoenhancing tumor (white arrows). Note the presence of air-containing necrosis around the right vertebral artery (black arrow). Angiography of the (b) right vertebral artery and (c) right common carotid artery showed focal vascular irregularity caused by tumor invasion (black arrows).
case_images: CRIONM2024-7925511.001.jpg
case_images: PMC11105956_01_CRIONM2024-7925511.001.jpg
case_images: fig1
case_images: Neck radiography and computed tomography angiography (Figure 1(a)) revealed threatened segments of the right vertebral artery, right common carotid artery (CCA), and right internal carotid artery (ICA) within the necrotic tumor.
case_images: (a) Coil embolization (black arrows) of right vertebral artery was performed until flow stasis (white arrow). (b) Coil embolization (black arrows) of the right internal to common carotid arteries was performed until stasis of antegrade blood flow (white arrow).
case_images: CRIONM2024-7925511.002.jpg
case_images: PMC11105956_01_CRIONM2024-7925511.002.jpg
case_images: fig2
case_images: Natick, MA) until achieving flow stasis (Figure 2). No ischemic symptoms developed after coil embolization, and no antithrombotic therapy was administered.
case_images: (a) Exposed embolization coils (white arrows) in the malignant wound (black arrow). (b) Neck radiograph showed exposed and migration of embolization coils (white arrow).
case_images: CRIONM2024-7925511.003.jpg
case_images: PMC11105956_01_CRIONM2024-7925511.003.jpg
case_images: fig3
case_images: Neck X-rays confirmed the exposure and migration of embolization coils (Figure 3).
case_images: Computed tomography angiography showed (a) exposed embolization coils (white arrows) in the malignant wound of right neck and (b) thrombosed right common carotid artery (black arrows).
case_images: CRIONM2024-7925511.004.jpg
case_images: PMC11105956_01_CRIONM2024-7925511.004.jpg
case_images: fig4
case_images: Since there were still sufficient coils within the thrombosed lumen of the right CCA and right ICA on computed tomography angiography, conservative management by transection of the exposed coils was performed (Figure 4).