Snapshot A previously healthy 29-year-old female presents with a progressive, diffuse headache and vomiting. She has no active illnesses, takes a multivitamin, and an oral contraceptive. On exam, there is edema on the scalp, papilledema on fundoscopy, and bilateral muscle weakness. Noncontrast head CT shows a hyperdense lesion in a part of the superior sagittal sinus. Overview Introduction Structure reflections in dura matter where meningeal and periosteal layers split Function return blood from cerebral veins to internal jugular vein Main examples superior sagittal sinus superior to falx cerebri tributary of the confluence of sinuses inferior sagittal sinus inferior to falx cerebri tributary to the straight sinus cavernous sinus lateral to the sella turcica tributary of the transverse sinus and sigmoid sinus contains CN III, IV, V1, V2, VI, and internal carotid clinical correlate login to view 5 more bullets Clinical importance venous sinus thrombosis → increases intracranial pressure obstruction → increases venous pressure consequences include: login to view 5 more bullets causes include: login to view 5 more bullets