emissary vein

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Related to Emissary veins: cavernous sinus
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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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The infection may spread from the face via the facial venous plexus, which connects to the valveless emissary veins into the cranium.
Septicemia and cavernous sinus involvement can develop by way of the emissary veins that drain the nasal septum.
This occurs when emissary veins are damaged and blood accumulates in the potential space between the galea aponeurotica (epicranial aponeurosis) and the periosteum of the skull (pericraniaum).