Characteristics of the dissected vessel in spontaneous and traumatic dissections
| Spontaneous (13 patients, 15 arteries) | Traumatic (9 patients, 12 arteries) | |
|---|---|---|
| Contralateral vessel involvement | 6/13 patients (46%) | 5/9 patients (54%) |
| Mean length of the dissected segment | 28.4 mm (±16.6) | 46.5 mm (±28.1) |
| Location | ||
| Extracranial ICA only | 8/15 (53.3%) | 6 (50%) |
| Extracranial+intracranial ICA | 6/15 (40%) | 6 (50%) |
| Extracranial ICA with CCA | 0/15 | 0/12 |
| CCA only | 1/15 (6.7%) | 0/12 |
| Degree of stenosis | ||
| <70 | 2/15 (13.3%) | 1/12 (8.3%) |
| 70–94 | 6/15 (40%) | 6/12 (50%) |
| 95–99 (near occlusion) | 6/15 (40%) | 5/12 (41.6%) |
| 100 | 1/15 (6.6%) | 0/12 |
| Presence of intraluminal thrombus | 1/15 (6.8%) | 2/12 (16.6%) |
| Pre-existing distal embolic occlusion | 1/15 (6.8%) | 2/12 (16.6%) |
| Tortuosity of the vessel | ||
| No significant tortuosity | 9/15 (60%) | 12/12 (100%) |
| Mild to moderate kinking | 2/15 (13.3%) | 0/12 |
| Sharp kinking | 1/15 (6.6%) | 0/12 |
| 360° loop | 2/15 (13.3%) | 0/12 |
| Dissecting aneurysms | 11 | 13 |
| Shape | ||
| Cylindrical | 4/11 (36.3%) | 8/13 (45.4%) |
| Saccular | 7/11 (63.7%) | 4/13 (36.4%) |
| Fusiform | 0/11 | 1/13 (18.2%) |
| Size | ||
| >10 mm | 7/11 (63.6%) | 7/13 (53.8%) |
| <10 mm | 4/11 (36.4) | 6/13 (46.15%) |
| Fibromuscular dysplasia | 3/15 (20%) | 0/12 |
CCA, common carotid artery; ICA, internal carotid artery.