Neck dissection nomenclature: Level IV nodes are located:
- A Between the carotid bifurcation and the clavicle along the lower jugular vein ✓
- B Between the hyoid bone and carotid bifurcation along the internal jugular vein
- C In the posterior triangle (spinal accessory chain)
- D Submandibular nodes
Correct answer: A. Between the carotid bifurcation and the clavicle along the lower jugular vein
Explanation
The Memorial Sloan Kettering/AAOHNS nodal classification divides the neck into six levels. Level IV contains lower internal jugular (jugulo-omohyoid) nodes, located between the omohyoid muscle crossing and the clavicle along the lower internal jugular vein. Level II is upper jugular (skull base to carotid bifurcation), Level III is middle jugular (carotid bifurcation to omohyoid), Level V is posterior triangle, Level I is submental/submandibular, and Level VI is central compartment (anterior visceral).
Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.
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Written and medically reviewed by the StethoPrep medical team.