From the case:
Arachnoid granulations
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/6653/annotated_viewer_json?iframe=true\u0026lang=us"}
Multiple, round, well-defined filling defects within the superior sagittal sinus.
Case Discussion
These filling defects are typical for arachnoid granulations, which are a normal finding. The differential diagnosis is primarily dural venous thrombosis.