Communicating carotid-cavernous sinus fistula following minor head trauma

INTRODUCTION: A case of communicating carotid-cavernous sinus fistula (CCF) after minor closed head injury is presented. CASE PRESENTATION: A 45-year-old Caucasian male presented to the emergency department of a tertiary care hospital with the chief complaint of blurred vision and facial numbness. The patient had experienced a minor head injury 1 month ago with loss of consciousness. After a 2-week symptom-free period, he developed scalp and facial numbness, along with headache and vision problems. His vital signs were within normal limits, but on examination the patient was noted to have orbital and carotid bruits with several concerning neurological findings. CT and MRI confirmed the suspicion of carotid-cavernous sinus fistula, which was managed by cerebral angiography with coil embolization of this fistula. The patient was symptom free at the 8-month follow-up. DISCUSSION: Carotid-cavernous sinus fistula is a rare condition that is usually caused by blunt or penetrating trauma to the head, but can develop spontaneously in about one fourth of patients with CCF. The connection between the carotid artery and cavernous sinus leads to increased pressure in the cavernous sinus and compression of its contents, and thereby produces the clinical symptoms and signs seen. Diagnosis depends on clinical examination and neuroimaging techniques. The aim of management is to reduce the pressure within the cavernous sinus, which results in gradual resolution of symptoms.