CVST is a rare form of stroke. It affects about 5 people in 1 million each year. The risk for this kind of stroke in newborns is greatest during the first month. Overall, about 3 out of 300,000 children and teens up to age 18 will have a stroke.

What are the risk factors for cerebral venous sinus thrombosis? Risk factors for children and infants include:
Problems with the way their blood forms clots
Sickle cell anemia
Chronic hemolytic anemia
Beta-thalassemia major
Heart disease - either congenital Iron deficiency
Certain infections
Dehydration
Head injury

For newborns, a mother who had certain infections or a history of infertility
Risk factors for adults include:

Pregnancy and the first few weeks after delivery
Problems with blood clotting; for example, antiphospholipid syndrome, protein C and S deficiency, antithrombin III deficiency, lupus anticoagulant, or factor V Leiden mutation
Cancer
Collagen vascular diseases like lupus
Obesity
Low blood pressure in the brain (intracranial hypotension)
Inflammatory bowel disease like Crohn’s disease or ulcerative colitis