Features of carotid-cavernous fistula include: (A) Dilated superior ophthalmic vein on CT scan, (B) Blood in the Schlemm's canal, (C) Proptosis of contralateral eye suggests bilateral carotid-cavernous fistula, (D) Traumatic fistula rarely close spontaneously
Answer is C. * With anterior drainage through orbit carotid cavernous fistula produce proptosis, diplopia, glaucoma and corkscrew, aerialized conjunctival vessels carotid-cavernous fistula results from an abnormal communication between the aerial and venous systems within the cavernous sinus in the skull. It is a type of aeriovenous fistula Ref Harrison20th edition pg 2567