mastoid emissary vein

mas·toid em·is·sar·y vein

[TA]
the vein that connects the sigmoid sinus with the occipital vein or one of the tributaries of the external jugular vein by way of the mastoid foramen.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The other inferiorly based periosteal flap is partially and carefully elevated to avoid disruption of the mastoid emissary vein (Figure 2).
Subdural hematoma has also been reported from mastoid emissary vein injury and from efforts to stop the bleeding [9].
The modified anterior-based periosteal flap is a safe procedure aimed at avoiding the mastoid emissary vein bleeding and allowing complete repositioning of the periosteum over the implanted device.
Possible etiologies include sigmoid sinus diverticulum, atherosclerosis, abnormal vascular loops, aneurysm of internal carotid artery, mastoid emissary vein, dural arteriovenous shunts, paraganglioma, involuntary contraction of muscles in the middle ear, and so forth [6-11, 28-36].
Pulsatile tinnitus is usually caused by vibrations from turbulent blood flow that reaches the cochlea, which often arises from sigmoid sinus diverticulum, atherosclerosis, aneurysm of internal carotid artery, abnormal mastoid emissary vein, dural arteriovenous shunts, paraganglioma, and so forth, [7, 28-30], while the exact etiology of nonpulsatile tinnitus remains unclear.
Turner, and P Liu, "Objective tinnitus associated with abnormal mastoid emissary vein," Journal of Otolaryngology, vol.
Of note, the posterior auricular vein also receives drainage from the sigmoid sinus via the mastoid emissary vein and this does pose a potential route for back flow if the pressure increases.
CTA revealed two dehiscence of sigmoid sinus wall and a mastoid emissary vein on the right side.
In third patient, although there are reports that mastoid emissary vein can lead to PT, but the operation result show that this patient's mastoid emissary vein is not the cause of the disease.