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Lateral view of brain, emissary veins
In this view sigmoid sinus is better seen. Note the proximity of the sinus to the auditory canal. The vein entering the sigmoid sinus is perhaps the mastoid emissary vein. Emissary veins are small valve less veins that connect the dural sinuses with external regions. Thus these veins allow spread of infection from external to intracranial regions.
Dr. S. Chandra
Dr. S. Chandra, Faculty of Medicine, Memorial University of Newfoundland
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