There is evidence of a pial AVM.
  [Yes/No]

There is evidence of a dural AV fistula with venous hyperemia.
  [Yes/No]

There is evidence of an underlying aneurysm (saccular, fusiform, inflammatory, mycotic).
  [Yes/No]

There is evidence of hemorrhage within an underlying enhancing tumoral intraaxial mass lesion.
  [Yes/No]

There is evidence of active bleeding (contrast leak) within a site of intra or extra axial hematoma.
  [Yes/No]

There is evidence of nonopacification within intracranial cortical or deep veins as a result of thrombosis.
  [Yes/No]

There is evidence of dural sinus thrombosis and collateralization of the dural wall venous plexus.
  [Yes/No]

There is evidence of underlying hypo or hyper perfused parenchyma in recognizable arterial or venous perfusion zone indicating tissue at hemorrhagic risk.
  [Yes/No]

Other significant imaging findings are present.   [Yes/No]