Right frontal deep AVM has small nidus from superior division of MCA - small ill-defined, probably from multiple branches (opercular).
Single draining vein passes medially, with venous varix, venous stenosis, then into internal cerebral vein and vein of Galen.
ECA injection showed no supply, and there was none from the contralateral carotid or vertebral injections. No arterial aneurysms identified.
Marked enlargement and retrograde filling of the ophthalmic veins noted on the ECA injection - filling from anterior to posterior - with no evidence of cavernous DAVF.
Conclusion:
Right frontal AVM with haemorrhage, venous stenosis, single draining vein passing to deep venous system. Small nidus, deep drainage, eloquent = Spetzler & Martin grade III.