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Fenestrated external jugular vein (3D-VR). Submental venous network draining the inferior labial veins. Anterior jugular network. Left antero-infero-lateral view. 1. proximal fenestration of the external jugular vein; 2. distal segment of the external jugular vein; 3. left inferior labial veins; 4. submental venous network; 5. right anterior jugular vein; 6. median cervical network; 7. left anterior jugular vein; 8. communicating vein.
