Table 4. Performance of Embolization.
| Grade of radiosurgical effect (SRS grade) | Total | A | B | C | B + C | ||
|---|---|---|---|---|---|---|---|
| category of group | S group | N group | |||||
| total number | 73 | 44 | 18 | 11 | 29 | S vs N group | |
| Performance of embolization | |||||||
| Embolization grade | E grade A1 | 12 | 12 | 0 | 0 | 0 | <0.001 |
| E grade A2 | 20 | 18 | 2 | 0 | 2 | ||
| E grade B1 | 19 | 8 | 7 | 4 | 13 | ||
| E grade B2 | 18 | 6 | 5 | 7 | 12 | ||
| E grade C | 2 | 0 | 2 | 0 | 2 | ||
| Final embolization rate | 61.2% | 63.6% | 60.0% | 53.6% | 57.6% | NS | |
| Final results of embolization | complete occlusion | 7 | 6 | 1 | 0 | 1 | NS |
| Size of remained nidus (diameter) | <1 cm | 22 | 16 | 5 | 1 | 6 | |
| 1-2 cm | 24 | 14 | 8 | 2 | 10 | ||
| 2-3 cm | 13 | 3 | 4 | 6 | 10 | ||
| ≥3 cm | 7 | 5 | 0 | 2 | 2 | ||
| Procedure-related complications | total | 14 | 7 | 5 | 2 | 7 | NS |
| hemorrhage (inta- & perioperative) | 8 | 6 | 2 | 0 | 2 | ||
| convulsion | 2 | 0 | 1 | 1 | 2 | ||
| others | 4 | 1 | 2 | 1 | 3 | ||
| Influence of complication on outcome | none | 11 | 7 | 2 | 2 | 4 | NS |
| mRS 1 rank down | 1 | 0 | 1 | 0 | 1 | ||
| mRS 2 rank down | 1 | 0 | 1 | 0 | 1 | ||
| mRS 3 rank down | 1 | 0 | 0 | 1 | 1 | ||