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Case 1. Pretreatment DSA examination in anteroposterior (AP; A) and lateral (B) views. Visualization of the angioarchitecture of the AVM through a superselective injection within the AchoA in AP (C) and lateral (D) projections. Intranidal progression of Onyx during transvenous injection from the intranidal portion of the main draining vein (E and F).
