Transarterial Onyx embolization of residual AVM after surgical resection.

OBJECTIVE: We sought to report transarterial Onyx embolization of residual brain arteriovenous malformation (AVM) after surgical resection. METHODS: From January 2017 to January 2019, 7 patients with residual AVM after surgery were treated by transarterial Onyx embolization. Demographics, angioarchitectural characteristics, complications, and results were retrospectively reviewed. RESULTS: All patients presented initially with a ruptured AVM. Residual AVM was found on control angiograms within 1 month after surgery. All residual AVMs were cured by transarterial Onyx embolization. One patients experienced feeding artery perforation without adding new neurologic deficits. CONCLUSIONS: Complete obliteration of residual AVMs can be obtained by salvage transarterial Onyx embolization.