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Cervical nodal levels |
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| Levels |
Nodes |
Boundaries |
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| Superior |
Inferior |
Anterior (medial) |
Posterior (lateral) |
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| IA Submental group |
Submental nodes |
Symphysis of mandible |
Body of hyoid |
Anterior belly of contralateral digastric muscle |
Anterior belly of ipsilateral digastric muscle |
| IB Submandibular group |
Submandibular nodes |
Body of mandible |
Posterior belly of digastric muscle |
Anterior belly of digastric muscle |
Stylohyoid muscle |
| IIA Upper Jugular group Nodes |
Nodes around upper portions of Internal jugular vein and Accessory Nerve |
Skull base |
Horizontal plane defined by the inferior border of hyoid bone |
Stylohyoid muscle |
Vertical plane defined by the spinal accessory nerve |
| IIB Upper Jugular group Nodes |
Skull base |
Horizontal plane defined by the inferior border of hyoid bone |
Vertical plane defined by the spinal accessory nerve |
Lateral border of the sternocleidomastoid muscle |
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| III Mid Jugular group |
Nodes around mid portions of Internal jugular vein |
Horizontal plane defined by the inferior border of hyoid bone |
Horizontal plane defined by the inferior border of cricoid cartilage |
Lateral border of the sternohyoid muscle |
Lateral border of the sternocleidomastoid muscle or sensory branches of the cervical plexus |
| IV Lower Jugular group |
Nodes around lower third of IJV |
Horizontal plane defined by the inferior border of cricoid cartilage |
Clavicle |
Lateral border of the sternohyoid muscle |
Lateral border of the sternocleidomastoid muscle or sensory branches of the cervical plexus |
| VA Posterior triangle group |
Nodes around lower part of Accessory nerve and transverse cervical vessels |
Apex of the convergence of sternocleidomastoid and trapezius muscles |
Horizontal plane defined by the inferior border of cricoid cartilage |
Lateral border of the sternocleidomastoid muscle or sensory branches of the cervical plexus |
Anterior border of the trapezius muscle |
| VB Posterior triangle group |
Horizontal plane defined by the inferior border of cricoid cartilage |
Clavicle |
Lateral border of the sternocleidomastoid muscle or sensory branches of the cervical plexus |
Anterior border of the trapezius muscle |
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| VI Central or anterior group |
Nodes surrounding midline visceral structures of neck |
Hyoid bone |
Suprasternal |
Common carotid artery |
Common carotid artery |
Harish World Journal of Surgical Oncology 2005 3:21 doi:10.1186/1477-7819-3-21 |
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