<![CDATA[Introduction : A carotid-cavernous sinus fistula (CCF) is an abnormal communication between arteries and veins within the cavernous sinus. Carotid cavernous fistula (CCF) is a very rare case it's difficult to diagnose. because most CCF patients rarely come for treatment. Case Report : A 33-year-old male presented with history of protrusion of Left eye ball, and double vision for the last 2 years. visual disturbances were found in the right eye for 2 years, blurry vision is increasingly. Bruit was audible in orbital region on the left side. DSA showed that there was a fistula in the left sinus cavernous region, the arteries in the left area showed inadequate to direct the left hemisphere, but in the right arety showed that the right artery was adversely affected right and left brain. Discussion : Traumatic CCFs are the most common type, accounting for up to 75% of all CCFs.87 They have been reported to occur in 0.2% of patients with craniocerebral trauma and in up to 4% of patients who sustain a basilar skull fractur.2 The symptoms and signs of CCF always include eyelid swelling, proptosis, chemosis, and hyperaemia, dilated of vessel and the condition is commonly misdiagnosed as Graves’ophthal-mopathy or inflammatory conjunctivitis.3Cerebral angiography is the gold standard for the definitive diagnosis, classification, and planning of endovascular intervention in CCFs. Angiographic results in this patient showed a fistula in the left cavernous sinus and inadequate supply of the left artery to the left hemisphere. Conclusion : This case is very unique because the left brain gets blood supply from the right carotid system, with the left carotid artery system inadequate to direct the left hemisphere because of the carotid cavernous fistula on the left side]]>
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