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Spontaneous carotid-cavernous fistula with fibromuscular dysplasia
Insights
A young woman with fibromuscular dysplasia developed a carotid-cavernous fistula. Obliterating the fistula prevented venous shunting, highlighting careful management considerations for co-existing vascular conditions.
Area of Science:
- Vascular Surgery
- Neurology
- Radiology
Background:
- A spontaneous carotid-cavernous fistula (CCF) is a rare condition.
- Fibromuscular dysplasia (FMD) affects the extracranial and intracranial arteries.
- The co-occurrence of CCF and FMD presents unique management challenges.
Observation:
- A young woman with known fibromuscular dysplasia of the extracranial cerebral arteries presented with a spontaneous carotid-cavernous fistula.
- The potential for increased contralateral flow after unilateral treatment raised concerns about precipitating a second CCF in the setting of FMD.
Findings:
- Initial conservative management was attempted but failed due to progressive symptoms.
- The cavernous sinus was successfully obliterated using bronze wire, effectively halting venous shunting.
- This intervention prevented the potential complication of a secondary CCF.
Implications:
- This case underscores the importance of considering underlying vascular conditions like FMD when managing CCF.
- Treatment strategies for CCF must account for potential hemodynamic changes and the risk of secondary fistula formation.
- Endovascular obliteration can be a safe and effective treatment for CCF, even in complex cases with associated FMD.
Abstract:
A young woman presented with a spontaneous carotid-cavernous fistula. She also had fibromuscular dysplasia of the extracranial cerebral arteries. The possible relationship of the two diseases brought up important questions concerning how to manage the patient. Treatment by obliteration of the carotid circulation on one side would be expected to increase blood flow on the other side. If the cavernous carotid artery on the second side was weakened by fibromuscular dysplasia, the increased flow might predispose to the formation of a second carotid-cavernous fistula. We first attempted to avoid surgery. When progressive symptoms occurred, the cavernous sinus was obliterated with bronze wire, thus preventing venous shunting.