Angioarchitecture
| Characteristic | Children (n=170) | Adults (n=583) | Total (n=753) | p Value |
| Nidus Size (cm) | 2.90±1.5 | 3.16±1.8 | 2.95±1.5 | 0.090 |
| Venous Drainage | <0.001 | |||
| Superficial | 50 (35%) | 297 (55%) | 347 (51%) | |
| Deep | 48 (33%) | 79 (15%) | 127 (19%) | |
| Superficial and Deep | 46 (32%) | 158 (30%) | 204 (30%) | |
| Venous Ectasia | 30 (31%) | 204 (52%) | 234 (48%) | <0.001 |
| Lobar Location | 96 (69%) | 404 (79%) | 500 (76%) | 0.013 |
| Central Location | 62 (44%) | 182 (35%) | 244 (37%) | 0.054 |
| Feeding Artery Aneurysm Related to Shunt Flow | 17 (13%) | 127 (27%) | 144 (24%) | 0.002 |