PMC8554241_01
MRI Brain: Abnormal FLAIR signal in the distal left transverse and sigmoid sinuses as well as the jugular bulb with loss of normal flow void. No corresponding signal abnormality on T1 or gradient weighted sequences (not shown). Findings favored to be slow flow but can be seen with dural venous sinus thrombosis in the setting of headaches. If there is clinical concern for dural venous sinus thrombosis, CT, or MR venogram should be considered for definitive diagnosis.
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F1
MRI brain findings showed an abnormal FLAIR signal with loss of flow void in the distal left transverse sinus, sigmoid sinus, and jugular bulb (Figure 1).
CT Venogram: filling defect in the left distal transverse sinus, sigmoid sinus, and jugular bulb, compatible with occlusive dural venous sinus thrombosis.
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F2
This was followed by a CT venogram, which revealed a filling defect in the left sigmoid sinus, jugular bulb, and visualized left internal jugular vein compatible with dural venous sinus thrombosis (Figure 2).