12 January 2018 : Case report
A Case of Right-Sided Direct Carotid Cavernous Fistula: A Diagnostic Challenge
Challenging differential diagnosis, Rare disease
Htun Latt1ABCDEFG*, Kyaw Kyaw2CDEFG, Htwe Htwe Yin1CDEFG, Deepak Kapoor1EFG, Sammy San Myint Aung2EFG, Raheel Islam1EFGDOI: 10.12659/AJCR.907291
Am J Case Rep 2018; 19:47-51
Abstract
BACKGROUND: Carotid cavernous fistulas (CCFs) are rare potentially sight-threatening abnormal connections between carotid artery and cavernous sinus.
CASE REPORT: We report a case of CCF in an 83-year-old female, who presented with swollen and painful right eye. The patient was initially treated with empiric antibiotics for suspected peri-orbital cellulitis, as noted clinically and in computed tomography (CT) orbits. However, lack of clinical improvement, physical finding of orbital bruit/thrill, and enlarged superior ophthalmic vein in magnetic resonance (MR) orbits suggest alternate diagnoses. Eventually, CT angiogram (CTA) and carotid-arteriography confirmed the diagnosis of right-sided direct CCF, which was subsequently treated with endovascular embolization. Not only does this case highlight the importance of CCF, which could be a differential diagnosis of swollen red eye, it also addresses the vital importance of physical examination in modern medicine despite the seemingly promising technologies.
CONCLUSIONS: Internists should have a low threshold of clinical suspicion for CCF in a patient with swollen red eyes in order to provide timely and proper management.
Keywords: Carotid-Cavernous Sinus Fistula, endovascular procedures, Exophthalmos, orbital cellulitis
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