emissary vein

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Related to emissary vein: mastoid emissary vein
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Noun1.emissary vein - one of several connecting veins in the scalp and head that drain blood from sinuses in the dura mater to veins outside the skull
vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"
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References in periodicals archive ?
5 mm; [sup][12] (7) petrosquamosal sinus, embryologic emissary vein running along the petrosquamosal Fissure; [sup][15] and (8) sinus thrombosis, signs of thrombosis were noted, including the empty ™-sign or an irregular filling defect.
The patency of the channel depends upon the condylar emissary vein that runs along its path.
The distal left sigmoid sinus and the internal jugular vein were occluded, and an emissary vein was identified draining off the left transverse sinus into the external jugular vein.
CTA revealed two dehiscence of sigmoid sinus wall and a mastoid emissary vein on the right side.