age > 18 year-old

patient with diagnostic of idiopathic intracranial hypertension, who failed medical treatment.

venous imaging showing bilateral transverse sinus stenosis or unilateral transverse sinus stenosis with contralateral transverse sinus atresia.

pressure gradient across the stenosis > 8 mmhg

signed informed consent obtained from the patient

allergic reaction to iodine contrast despite premedication

contraindication to general anesthesia,

contraindication to aspirin, clopidogrel (plavix®) or anticoagulants

patient with medical history of intracranial venous thrombosis

pregnant women