Common carotid artery thrombosis (CCT) represents 7% of supraaortic artery thrombosis (TSA). CCT is responsible for neurological symptoms in 92% of cases. Antiphospholipe antibody syndrome (APS) is a rare cause, and its association with thrombocytosis is exceptional. We report a case of stenosing TBI secondary to APS associated with thrombocytosis discovered during a stroke. Ultrasound was the means of diagnosis and monitoring of CCT. The diagnosis of APS was biological. The cause of our patient’s thrombocytosis remains unknown. The treatment was only medical followed by a good clinical evolution. Anticoagulation has been used for treatment in the acute phase but also for the prevention of stroke recurrence.
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