Editing Neck (section)

== '''Lymph node levels''' ==

* 1: Hyoid inferiorly, mandible     superiorly, and laterally a line from posterior submandibular gland to     anterior SCM
* 2-3-4 along SCM:
** 2: Superiorly mandible/skull      base, laterally posterior SCM, inferiorly hyoid, medially a line between      posterior submandibular gland and anterior SCM
** 3: A square - superiorly      level of hyoid, inferiorly level of cricoid cartilage, medially carotid,      laterally posterior SCM
** 4: Superiorly level of      cricoid cartilage, inferiorly clavicle, medially anterior SCM/carotid,      laterally posterior SCM
* 5: Laterally trapezius,     medially posterior SCM, inferiorly clavicle
* 6: Superiorly hyoid,     laterally carotid, inferiorly sternal notch
* 7: Pre-tracheal and     paratracheal superior mediastinal lymph nodes down to level of innominate     artery