Angiographic characteristics at recurrence or in children with a single episode of hematomyelia on angiography performed close to the mean time of the angiography performed in children with recurrence
| Microachitecture | Children with Recurrent Episodes | Children with Single Episode | P |
|---|---|---|---|
| (n = 12) (44) | (n = 15) (56) | ||
| Follow-up (yr) | |||
| Median | 2.8 (0.10–9.3) | 1.3 (0.4–4.8) | NS |
| Mean | 3.7 ± 2.7 | 1.8 ± 1.3 | NS |
| Cure | 0 | 5 (33) | |
| Radiculomedullary feeder alone | 3 (25) | 1 (7) | NS |
| Radiculopial feeders alone | 8 (67) | 5 (33) | NS |
| Combination of both feeders | 1 (8) | 5 (33) | NS |
| Anterior spinal vein drainage | 4 (33) | 0 | NS |
| Radicular vein drainage | 7 (58) | 8a (53) | NS |
| Anterior spinal and radicular vein drainage | 1 (8) | 2a (13) | NS |
| Perimedullary vein drainage | 12 (100) | 5 (33) | .002 |
| Intranidal ectasia | 6 (50) | 2 (15) | .01 |
| Draining vein stenosis ≥50% (n = 26) | 1/11 (9) | 2 (13) | NS |
| Pseudoaneurysm (n = 23) | 2 (17) | 0 | NS |
| Occlusion rate ≥50% | 4 (33) | 10 (66) | .047 |
| Occlusion rate ≥70% | 0 | 10 (66) |
Note:—NS indicates not significant.
↵a For children with a single episode, radicular vein, or a combination of radicular and anterior spinal veins, drainage was associated with perimedullary vein drainage in 50% of cases.