Cerebral venous thrombosis (CVT) are due to the formation of clots (thrombus) in the veins of the brain. They are a rare cause of stroke.
CVT may lead to difficulties in the circulation of cerebro-spinal fluid (CSF) and be responsible for intracranial hypertension, cerebral lesions (intracranial hemorrhages or infarction), sometimes in multiple locations. They are sometimes difficult to diagnose.
Their prognosis is better than it is for arterial stroke.