case_images: PMC11090541_01
case_images: (a) Digital subtraction angiogram demonstrating the left extracranial internal carotid artery-dissecting aneurysm. (b-e) Three-dimensional digital subtraction angiograms indicate an intimal flap and narrowing of the true lumen. (c) Axial images indicate a re-entry tear (arrowhead) in the upper line level, (d) an intimal flap in the middle line level, (e) and an entry tear (arrow) in the lower line level. (f) Computed tomographic angiogram demonstrating an elongated left styloid process near the dissecting aneurysm.
case_images: SNI-15-126-g001.jpg
case_images: PMC11090541_01_SNI-15-126-g001.jpg
case_images: F1
case_images: Digital subtraction angiography (DSA) revealed a DA in the left distal cervical ICA extending into the petrous portion [Figure 1a]. Three-dimensional DSA revealed entry and re-entry tears in the intimal flap [Figures 1b-e]. Computed tomography angiography revealed an elongated left styloid process, which was 35 mm in length and near the DA [Figure 1f].
case_images: (a) Digital subtraction angiogram (DSA) immediately after stent placement exhibiting blood flow stagnation in the dissecting aneurysm. (b) DSA after 7 d exhibiting regression of the dissecting aneurysm. (c) Three-dimensional DSA after 7 d indicates the remaining thrombosis in the dissecting aneurysm (arrowhead). (d) DSA after six months exhibiting almost complete occlusion of the dissecting aneurysm. (e) Three-dimensional DSA after six months indicating thrombosis regression in the dissecting aneurysm. (f) Reconstructed image from three-dimensional DSA after six months indicating the positional relationship between the flow-diverting stent and the styloid process.
case_images: SNI-15-126-g002.jpg
case_images: PMC11090541_01_SNI-15-126-g002.jpg
case_images: F2
case_images: A post-FDS placement DSA demonstrated blood flow stagnation in the DA and true lumen dilation [Figure 2a]. The DSA performed 7 d after FDS placement exhibited regression and thrombosis of the DA [Figures 2b and c]. Six months after FDS placement, DSA revealed almost complete obstruction of the DA and regression of the thrombus in the DA [Figures 2d-f], and the symptoms were completely resolved.