This is a blood clot in the dural venous sinuses
, which drain blood from the brain, and was diagnosed following a week of severe migraines.
The emissary vein passing through the foramen is called 'Vein of Vesalius.' The vein establishes a connection between extracranial veins and intracranial dural venous sinuses
. So septic thrombus may pass to intracranial venous sinuses from extracranial source.
(11) Other intracranial findings may include: subdural hygromas or hematomas, enlargement of the pituitary gland, ventricular collapse, engorged dural venous sinuses
or plexus, and superficial siderosis.
The cerebral veins coursing beneath deep surface of arachnoid matter are further drain to the nearest dural venous sinuses
. Superficial cerebral veins are alienated into three categories; dorsomedial, ventrolateral and anterior groups that drain into superior sagittal, lateral and cavernous sinus, respectively.
Multiplanar postcontrast images showed diffuse pachymeningeal enhancement, sagging of the SCC, narrowing of the suprasellar cisterna, enlargement of the pituitary gland, and distension of the dural venous sinuses
Although the exact mechanism is unknown, it is highly indicative that CSF hypovolemia causes decrease of intracranial pressure, thereby causing enlargement of dural venous sinuses
that becomes an important factor in the pathogenesis of subdural hemorrhage.
On angiographic studies AG appear as ovoid filling defects in the dural venous sinuses
in the venous phase .
Also they may cause non-obstructive thrombosis of the dural venous sinuses
by creating a venous hypertensive state and prevent the CSF drainage.
Traumatic thrombosis of dural venous sinuses
in closed head injuries.
Anatomical variations of occipital bone impressions for dural venous sinuses
around the torcular Herophili, with special reference to the consideration of clinical significance.
The guidelines include an algorithm for diagnosing and managing cerebral venous thromboembolism (CVT), which is caused by a clot in the dural venous sinuses
, veins that drain blood from the brain toward the heart.
Septic thrombosis of the dural venous sinuses
. Medicine (Baltimore) 1986:65:82-106.