Complications of embolization with Onyx in 6 of 44 patients
| Sex/Age (y) | AVM Location and Size | Estimated Size Reduction (%) | Complication | Additional Therapy | Outcome, GOS |
|---|---|---|---|---|---|
| M/31 | Right temporal, 3.5 cm | 95 | Hemorrhage 3 d after embolization | Acute surgical removal of hematoma and AVM | No deficit at 3 mo, GOS 5 |
| M/44 | Left temporal 3.5 cm | 80 | Partial occlusion M2 by reflux | Radiosurgery | Transient dysphasia, GOS 5 |
| M/51 | Right frontoparietal, 4.5 cm | 50 | Hemorrhage during embolization | Death, GOS 1 | |
| M/60 | Left parietal, 5 cm | 90 | Reflux in distal ACA branch | Radiosurgery | Transient paresis right leg, GOS 5 |
| M/27 | Right parieto-occipital, 4 cm | 90 | Hemorrhage 3 h after embolization | Acute surgical removal of hematoma and AVM | Quadrantanopsia, GOS 4 |
| F/44 | Right partietal, 7 cm | 40 | Reflux in distal ACA branch | Refused | Distal paresis left leg, GOS 4 |
AVM indicates arteriovenous malformation; ACA, anterior cerebral artery; GOS = Glasgow Outcome Score; M2, second segment of middle cerebral artery.