2024年8月25日 · Historically, the lymph nodes in the neck have been anatomically divided into at least six neck lymph node levels for head and neck cancer staging and therapy-planning purposes. Differing definitions exist across specialties 1-4 .

2024年9月24日 · The levels of lymph nodes in the neck are classified into six main levels: Level I (submental and submandibular), Level II (upper jugular), Level III (middle jugular), Level IV (lower jugular), Level V (posterior triangle), and Level VI (pretracheal and paratracheal).

2024年7月27日 · The location of level 3 cervical nodes are: Level 3 tends to drain the naso-/oro-/hypopharynx and larynx. The lower jugular group has 4A & 4B sublevels containing the thoracic duct and Virchow's node.

Nodes in level III are at risk of harboring metastases from cancers of the oral cavity, nasopharynx, oropharynx, hypopharynx and larynx. The border between level IVa and IVb is set arbitrarily 2 cm cranial to the sterno-clavicular joint.

2024年5月23日 · Diseases Commonly Affecting Level III Nodes: Their involvement is particularly noted in cancers of the throat and mouth, serving as indicators of disease spread. Detailed Description and Importance: Located along the lower third of the internal jugular vein, these nodes drain parts of the neck, thyroid, and esophagus.

Caudal to these nodes are the level III or midjugular nodes, which are bordered inferiorly by the crossing of the omohyoid muscle with the internal jugular vein at the level of the inferior rim of the thyroid cartilage.

2018年2月27日 · Level III (mid-jugular region) extends from the hyoid superiorly to the cricoid cartilage inferiorly. Level IV (lower jugular region) extends from the cricoid cartilage down to the clavicle.

Lymph node from level III (middle jugular nodes) extend from the level of the bottom of the body of the hyoid bone to the level of the bottom of the cricoid arch. They are located around the middle third of the internal jugular vein.

2019年10月2日 · Level III: Middle Jugular. Inferiorly: Horizontal plane defined by the inferior border of the cricoid cartilage. Posteriorly: Posterior border of the sternocleidomastoid muscle. Drainage & associated primary malignancies: Oral cavity, nasopharynx, oropharynx, hypopharynx, and larynx. Level IV: Lower Jugular.

Definition of Lymph Node Groups ....................................................................25. Levels IIA and IIB: Upper Jugular Group .....................................................26. Level III: Middle Jugular Group ......................................................................26.