Table 2:

Angiomorphologic characteristics of spinal epidural arteriovenous fistulas

Patient No.	Arterial Feeder^{^a}	Origin of Intradural Radicular Drainage Vein^{^a}	Extension of Epidural Pouch^{^b}	Extension of Arterialized Perimedullary Veins^{^b}	Location of Arterialized Perimedullary Veins^{^b}	No. of DSAs until Diagnosis
1	L3 R	L3 L	L3–L4	T8–T12	D = V	2
2	L3 bilateral, L4 L	L3 L	L2–L4	T3–T12	D = V	2
3	L1 R	L1 R	L1	ND	D < V	1
4	L3 bilateral	L3 R	L3	T9–L1	D > V	1
5	Left iliolumbar artery	S1	S1	T7–T12	D > V	3
6	T10 L and T11 L	L2 L	T 10–L3	T6–L1	D = V	3
7	L1 L	L2 L	L1–L2	T3–T12	D = V	1
8	T12 L	T12 L	T12 L	T11	D > V	3
9	L3 L	L3 L	L3 L	T6–T12	D < V	1
10	L4 R	L4 R	L2–L4	T3–T10	D = V	1
11	L3 L	S1 bilateral	L3–S1	T10–L1	D > V	1
12	L3 R	L3 R	L3 R	T9–T12	D < V	1
13	L1 R	L1 R	L1 R	T10–L1	D > V	1

Note:—D indicates dorsal to spinal cord; V, ventral to spinal cord; L, left; R, right; ND, no data.
↵a DSA.
↵b MRA/DSA.