What additional testing besides LAC/APLS, factor V Leiden, prothrombin gene mutation, JAK 2 do you draw for unprovoked cerebral venous sinus thrombosis?

Cerebral venous sinus thromboses (CVST) are often put into the category of "thromboses of unusual sites,"--as opposed to the more common lower extremity thromboses or pulmonary emboli.

Provoked causes of CVST include pregnancy or exogenous estrogen use, infection of the head/neck or CNS, head trauma,...