There is arteriovenous shunting occurring a focal point just above the left transverse sinus, the dysplastic vein draining parallel to the sinus posteriorly, then turning superiorly to run into para sagittal course some 5 -10 mm from the Then a 180 degrees turn into the superior sagittal sinus at the vertex. Arterial supply is from trans-osseous branches of the occipital artery, the ascending pharyngeal artery, there was retrograde opacification of the dysplastic appearing posterior division of the MMA - likely a previous supplied by having been sacrificed as part of the decompressive craniectomy flap. There is a large venous aneurysm more varix at the site of the occipital intraparenchymal haematoma. The vein above this is severely dysplastic. No arterial aneurysms are shown. There is arterial supply from the left posterior inferior cerebellar artery, a midline branch presumed meningeal given the supply to this area which is above the tentorium, and there is also some supply from a similar branch from the right posterior inferior cerebellar artery. There is no separate supply from the internal carotid artery