internal vertebral venous plexus

(redirected from epidural venous plexus)

internal vertebral venous plexus

[TA]
plexus of unvalved veins embedded in the fat of the epidural space within the vertebral canal, with greatest venous density posterior to the vertebral bodies and intervertebral discs (anterior internal vertebral venous plexus [TA]) and anterior to the laminae and ligamentum flavum (posterior internal vertebral venous plexus [TA]); receives drainage from the vertebral bodies through the basivertebral veins, communicates superiorly with the dural venous sinuses, and through the intervertebral foramina by way of the intervertebral veins at all levels.
See also: vertebral venous system.
References in periodicals archive ?
However, total excision is usually difficult because the cyst generally tightly adheres to the neural tissue of the dura, or because of intraoperative bleeding from a well-developed epidural venous plexus.
1) These fistulae usually drain into the vertebral venous plexus, or intrathecally via the epidural venous plexus.
Because the extensive epidural venous plexus is devoid of valves, increased pressure may lead to rupture of the veins and an epidural hematoma (1).