Acute venous sinus thrombosis
2 days of worsening headache with associated nausea and vomiting. Left sided headache made worse on bending forward.
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Plain Brain CT shows an area of hyperdensity corresponding to the Left transverse sinus and sigmoid sinus.
CT venogram demonstrates a filling defect extending from left transverse sinus and sigmoid sinus.
On plain CT imaging venous sinus thrombosis appears hyperdense.
This however can be difficult to distinguish from a normal venous sinus which normally appears slightly hyperdense compared to brain tissues.
In such cases, CT venogram can help confirm the diagnosis by demonstrating filling defects.