Characteristics of AVMs by AVM Type
| Nidal AVM (n = 51) (46.4) | CVM (n = 58) (52.7) | Pial AVF (n = 1) (0.0) | |
|---|---|---|---|
| Location | |||
| Frontal | 21 (37.9) | 26 (44.8) | 1 (100.0) |
| Parietal | 4 (7.8) | 11 (19.0) | 0 (0.0) |
| Occipital | 7 (13.7) | 5 (8.6) | 0 (0.0) |
| Temporal | 8 (15.7) | 6 (10.3) | 0 (0.0) |
| Cerebellar | 10 (19.6) | 7 (12.1) | 0 (0.0) |
| Brain stem | 1 (2.0) | 1 (1.7) | 0 (0.0) |
| Basal ganglia/thalamic | 0 (0.0) | 2 (3.5) | 0 (0.0) |
| Spetzler Martin size | |||
| <3 cm | 39 (95.1) | 58 (100.0) | 0 (0.0) |
| 3–6 cm | 1 (2.4) | 0 (0.0) | 1 (100.0) |
| >6 cm | 1 (2.4) | 0 (0.0) | 0 (0.0) |
| Eloquent location | |||
| Yes | 26 (63.4) | 24 (41.4) | 1 (100.0) |
| No | 15 (36.6) | 34 (58.6) | 0 (0.0) |
| Deep venous drainage | |||
| Yes | 10 (25.0) | 6 (10.3) | 0 (0.0) |
| No | 30 (75.0) | 52 (89.7) | 1 (100.0) |
| Spetzler Martin score | |||
| 1 | 13 (32.5) | 30 (51.7) | 0 (0.0) |
| 2 | 19 (47.5) | 26 (44.8) | 0 (0.0) |
| 3 | 7 (17.5) | 2 (3.5) | 0 (0.0) |
| 4 | 0 (0.0) | 0 (0.0) | 1 (100.0) |
| 5 | 1 (2.5) | 0 (0.0) | 0 (0.0) |
Note:—CVM indicates capillary vascular malformation.