A 70-year-old man with subarachnoid hemorrhage centered in the prepontine cistern (A). A 70-year-old man with subarachnoid hemorrhage centered in the prepontine.

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Presentation transcript:

A 70-year-old man with subarachnoid hemorrhage centered in the prepontine cistern (A). A 70-year-old man with subarachnoid hemorrhage centered in the prepontine cistern (A). Left vertebral artery angiography (anteroposterior view) reveals an AVM of the region of the torcula and a large irregular aneurysm of the left superior cerebellar artery (B and C). The presence of isolated subarachnoid hemorrhage suggests the aneurysm as the source of hemorrhage. The aneurysm was treated selectively with N-butyl cyanoacrylate embolization as noted on postprocedural angiography (anteroposterior view) (D), while the treatment of the AVM nidus was deferred. S.K. Rammos et al. AJNR Am J Neuroradiol 2016;37:1966-1971 ©2016 by American Society of Neuroradiology