AVM characteristics and factors associated with obliteration at initial GKRS
| Total No. (n = 150) | Obliteration (n = 104) (69.3%) | Incomplete Obliteration (n = 46) (30.7%) | P Value | |
|---|---|---|---|---|
| Rupture (No.) (%) | 53 (35.3) | 33 (31.7) | 20 (43.5) | .13 |
| Spetzler-Martin grade (No.) (%) | <.001 | |||
| I/II | 80 (53.3) | 68 (65.4) | 12 (26.1) | |
| III/IV/V | 70 (46.7) | 36 (34.6) | 34 (73.9) | |
| Median AVM score (range) | 1.19 (0.289–3.92) | 1.16 (0.289–2.23) | 1.28 (0.302–3.92) | .05 |
| Deep drainage (No.) (%) | 86 (57.3) | 54 (52.0) | 32 (69.6) | .04 |
| Location (No.) (%) | .016 | |||
| Lobar | 112 (74.7) | 80 (76.9) | 32 (69.6) | |
| Thalamus/basal ganglia/brainstem | 22 (14.7) | 10 (9.6) | 12 (26.1) | |
| Cerebellum | 16 (10.7) | 14 (13.5) | 2 (4.3) | |
| Eloquent cortex of adjacent brain (No.) (%) | 82 (54.6) | 50 (48.1) | 32 (69.6) | .02 |
| Prior embolization (No.) (%) | 15 (10.0) | 10 (9.6) | 5 (10.9) | .77 |
| Median AVM volume (range) (mL) | 3.51 (0.026–31.3) | 1.51 (0.026–13.6) | 3.6 (0.027–31.3) | .007 |
| Median margin dose (range) (Gy) | 20 (12–23) | 20 (12–23) | 18 (12–23) | <.001 |