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The suprahyoid anastomosis of facial veins ((A), modified from [38]), compared with (B), the transverse hyoid anastomosis of the right external and left anterior jugular systems in Figure 5). 1. internal jugular vein; 2. subclavian vein; 3. external jugular vein; 4. facial vein; 5. anterior jugular vein; 6. submental/suprahyoid anastomosis of the facial veins; 7. transverse hyoid anastomosis of the right external and left anterior jugular systems (anatomic variant).
