Answer

From the question on page 451

Budd Chiari syndrome (BCS) with sagittal sinus thrombosis is associated with anti-thrombin III and protein C deficiencies, and oral contraceptive use CT scan of the brain (figure 1) reveals a hyper-attenuating triangular area in the sagittal sinus (dense vein sign), suggestive, although not diagnostic of sagittal sinus thrombosis. This radiological sign is neither sensitive nor specific, being present in only 20–55% of patients with venous sinus thrombosis; chronic thrombus having …