Table 2.

Dissecting signs on catheter angiography, and VWI for the individual patient and lesion

Patient No.	Symptoms and time from onset to imaging	Lesion location	Catheter angiography			VWI
			Direct sign	Indirect sign	Diagnosis	Direct sign	Indirect sign	Diagnosis
1	Diplopia, 90 days	BA	–	Fusiform dilation	Possible VBDA	IMH	Fusiform dilation	VBDA
2	Dizziness and limb weakness, 10 days	Left ICVA	–	Fusiform dilation with stenosis	Possible VBDA	Intimal flap/ double lumen/ IMH	Fusiform dilation with stenosis	VBDA
		Right ICVA	–	Aneurysmal dilation	Possible VBDA	Intimal flap/ double lumen	Aneurysmal dilation	VBDA
3	Recurrent vertigo, 61 days	Left ICVA to BA	Intimal flap/double lumen	Fusiform dilation with stenosis	VBDA	Intimal flap/ double lumen	Fusiform dilation with stenosis	VBDA
4	Limb numbness and weakness, 30 days	Right ICVA to BA	–	Fusiform dilation with stenosis	Possible VBDA	Intimal flap/ IMH	Fusiform dilation with stenosis	VBDA
5	Slurred speech, 26 days	Left ICVA to BA	–	Irregularity	Possible VBDA	Intimal flap/ double lumen	Irregularity	VBDA
6	Recurrent dizziness, 1460 days	Left ICVA	–	Aneurysmal dilation	Possible VBDA	Intimal flap/ double lumen/ IMH	Aneurysmal dilation	VBDA
7	Recurrent dizziness, 61 days	Left ICVA	–	Aneurysmal dilation with stenosis	Possible VBDA	Intimal flap/ double lumen/ IMH	Fusiform dilation	VBDA
		Right ICVA	–	Irregularity	Possible VBDA	Intimal flap/ double lumen	Irregularity	VBDA
8	Recurrent vertigo, 30 days	BA	–	Stenosis	Possible VBDA	Intimal flap/ double lumen	Fusiform dilation	VBDA
		Left ICVA	Intimal flap/double lumen	Aneurysmal dilation with stenosis	VBDA	IMH	Fusiform dilation with stenosis	VBDA
9	Recurrent headache, 365 days	Left ICVA	–	Aneurysmal dilation	Possible VBDA	Intimal flap/ double lumen/ IMH	Aneurysmal dilation	VBDA
10	Recurrent headache, 30 days	Left ICVA	–	Aneurysmal dilation	Possible VBDA	IMH	Aneurysmal dilation	VBDA
11	Recurrent dizziness, 60 days	BA	Intimal flap/double lumen	Fusiform dilation with stenosis	VBDA	Intimal flap/ double lumen	Fusiform dilation with stenosis	VBDA
12	Recurrent vertigo, 7 days	Left ICVA	–	Fusiform dilation with stenosis	Possible VBDA	Intimal flap/ double lumen/ IMH	Fusiform dilation with stenosis	VBDA
13	Coma, 4 h	Left ICVA	–	Aneurysmal dilation	Possible VBDA	Intimal flap/ double lumen	Aneurysmal dilation	VBDA
14	Dizziness and slurred vision, 30 days	BA	Intimal flap/double lumen	Stenosis	VBDA	Intimal flap/ double lumen	Irregularity	VBDA
		Left ICVA	–	Stenosis	Possible VBDA	Intimal flap/ double lumen/ IMH	Stenosis	VBDA
15	Recurrent headache, 1460 days	BA	–	Irregularity	Possible VBDA	Intimal flap/ IMH	Irregularity	VBDA
16	Dizziness, 1 day	Right ICVA	–	Aneurysmal dilation	Possible VBDA	Intimal flap/ IMH	Aneurysmal dilation	VBDA
17	Recurrent dizziness, 30 days	BA	Intimal flap/ double lumen	Aneurysmal dilation with stenosis	VBDA	Intimal flap/ double lumen/ IMH	Fusiform dilation with stenosis	VBDA
18	Dizziness, 60 days	BA	–	Fusiform dilation	Possible VBDA	Intimal flap/ double lumen	Fusiform dilation	VBDA
19	Recurrent headache, 365 days	Distal segment of right ICVA	Intimal flap/ double lumen	Fusiform dilation	VBDA	Intimal flap/ double lumen	Fusiform dilation	VBDA
		Proximal segment of right ICVA	Intimal flap/ double lumen	Aneurysmal dilation	VBDA	Intimal flap/ double lumen	Aneurysmal dilation	VBDA
		Left ICVA	–	Occlusion	Possible VBDA	IMH	Occlusion	VBDA
20	Limb numbness and weakness, 60 days	BA	–	Fusiform dilation	Possible VBDA	— (Normal wall thickness)	Fusiform dilation	Segmental ectasia
21	Dysphagia and right side weakness, 20 days	Right ICVA	–	Fusiform dilation	Possible VBDA	— (Normal wall thickness)	Fusiform dilation	Segmental ectasia

VWI vessel wall images, BA basilar artery, IMH intramural haematoma, VBDA vertebrobasilar dissecting aneurysm, ICVA intracranial vertebral artery