diploic vein

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Noun1.diploic vein - one of the veins serving the spongy part of the cranial bones
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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On magnetic resonance imaging, the lesion was found to be sinus pericranii--a rare disorder described in the literature as being "characterized by a congenital or acquired epicranial blood-filled nodule of the scalp that is in communication with an intracranial dural sinus through dilated diploic veins of the skull" (J.
6) Children have more diploic veins in the cranium than do adults, which allows infections to spread more deeply and more rapidly; this explains why sinus complications in children are more common and more severe.