Abstract

BackgroundIndirect carotid-cavernous fistulas (CCF) are dural arteriovenous fistula of the cavernous sinus and generally present with ocular symptoms. High index of clinical suspicion and radiological work up is required for diagnosis, and treatment is primarily endovascular embolization. We present our experience in diagnosis and management of indirect CCF along with technical evolution to perform embolization and different vascular accesses for difficult anatomy.ResultsAmong a total of 20 indirect CCF cases who were treated with embolization in our department from 2013 to 2020, five (25%) were type C and 15 (75%) were type D. Seven were treated with trans-arterial access only, 11 were treated by transvenous access only, and two were treated by taking both transvenous and trans-arterial access. No recurrence was seen in angiographically cured patients. Out of seven patients who suffered various grades of visual deficit, five recovered completely and two had fixed visual deficit. Third and sixth cranial nerve palsy persisted in two patients even after CCF embolization.ConclusionIndirect CCF is a treatable cause of troublesome ocular symptoms. Endovascular embolization is preferred treatment with excellent short- and long-term outcome. The embolization becomes difficult and challenging in cases where the conventional vascular access to the cavernous sinus is occluded.

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