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Table 2: Radiologic features of deep lumbosacral spinal dural arteriovenous fistulas
Case No. MRI/MRA DSA
Shunt Location T2/T1 Hyperintensity (Extension) Contrast Enhancement (Extension) Perimedullary Vein Enlargement (Extension) Prominent FV Prominent Lumbar Vein DSA until Diagnosis Arterial Feeder
1 S1 R T7-conus T9–T10 Mild, T7–T8 No No 4 Iliolumbar artery R
2 L5 R T9–T11 T5–T11 Mild, T5–T11 No Yes 4 Iliolumbar artery R
3 S1 L T8-conus Absent Absent Yes No 4 Middle sacral artery L
4 S1 R T9-conus Absent Mild, T10–T12 Yes No 3 Iliolumbar artery R
5 S1 R T3-conus ND ND Yes No 3 Iliolumbar artery R
6 L5 L T8-conus T9-conus Mild, T10–T12 No Yes 2 L5 L
7 S1 R T6-conus T8–T12 Mild, T7–T11 No Yes 2 Lateral sacral artery L
8 S2 R T10–T12 T11–T12 Mild, T11–T12 Yes No 3 Lateral sacral artery R
9 L5 L T4-conus T9–T12 Absent No Yes 3 L4 L
10 S1 R T4-conus Absent Severe, T6-conus Yes No 2 Lateral sacral artery R
11 S1 R T6-conus T12–L1 Mild, T6-conus No Yes 5 Iliolumbar artery bilateral
12 S3 R T10-conus T12 Severe, T7-conus Yes No 3 Lateral sacral artery bilateral
13 S1 R T2-conus T12-conus Mild, T8-conus Yes No 4 Iliolumbar artery R
14 S2 L T5-conus T7-conus Mild, T8–L3 Yes No 4 Iliolumbar artery bilateral
15 S1 L T5-conus Absent Severe, T7-conus Yes No 2 Lateral sacral artery L
16 S2 L Absent T10–11 Absent Yes No 2 Iliolumbar artery L
17 S1 L T5-conus T4–L1 Mild, T3–T4 Yes No 2 Iliolumbar artery bilateral
18 S2 L T8–T12 T8–T11 Mild, T9–T12 Yes No 5 Iliolumbar artery bilateral
19 L5 R T8-conus T8-conus Severe, T6–T12 No Yes 2 Iliolumbar artery R
20 S2 R T12-conus T9-conus Mild, T7–T11 No Yes 1 Lateral sacral artery
Note:—R indicates right; L, left; ND, no data.