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A noncontrast CT scan of brain in axial section showing hyperdense changes (the empty delta sign) consistent with sinovenous thrombosis of t posterior part of the sagittal sinus.
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To rule out causes of intracranial hypertension, a computed tomography (CT) scan of the brain was performed, and this revealed an extensive sinovenous thrombosis of the superior sagittal sinus ("empty delta" sign), the right transverse sinus, and the right sigmoid sinus (Figure 1).
MRI of the brain (FLAIR) showed a high signal in the posterior part of the sagittal sinus.
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Three-dimensional phase-contrast MRA showed extensive sinovenous thrombosis, involving the superior sagittal sinus, the right sigmoid sinus and the lateral sinus.
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