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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.