CT
contrast opacification identified within the left cavernous sinus and the engorged left orbital vein
the entire venous system on the left orbit and left cavernous sinus opacified with contrast on arterial phase CT, which indicates presence of caroticocavernous fistula; this has lead to distension of left ophthalmic and left facial vein
given a direct communication between the carotid and cavernous system is not definitely established on CT angiogram, this may reflect a dural shunt between the intracavernous branches of ICA (internal carotid artery) and cavernous sinus
no CT evidence of thyroid orbitopathy or orbital mass