Venous Sinus Thrombosis in a 2-YO

I fielded a question from the ASCLS Consumer Information Forum last week. A mom asked about thrombosis risk factors in a 2-YO who had suffered a venous sinus thrombosis. Fortunately the child was treated and had no lasting effects, but do you know of any data that document anti-phospholipid antibody syndrome (lupus anticoagulant) in pediatric populations?