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Off-the-Wall Guide Neck Node Stations BORDERS Level IA CRANIAL CAUDAL ANTERIOR POSTERIOR MEDIAL LATERAL Geniohyoid muscle Mylohyoid muscle Lateral process of C1 vertebra Body of hyoid Platysma, symphysis bone menti Hyoid bone Platysma, symphysis menti Hyoid bone Submandibular gland (posterior border) Body of hyoid bone N/A Submandibular gland (posterior border) Sternocleidomastoid (posterior border) Anterior belly of digastric muscle Medial edge of ICA, paraspinal muscles Level III Hyoid bone Cricoid cartilage Sternocleidomastoid (anterior border) Sternocleidomastoid (posterior border) Medial edge of ICA, paraspinal muscles Sternocleidomastoid Level IV Cricoid cartilage Clavicle Sternocleidomastoid Sternocleidomastoid (anteromedial border) (posterior border) Medial edge of ICA, paraspinal muscles Sternocleidomastoid Level V Hyoid bone Clavicle Sternocleidomastoid (posterior border) Trapezius muscle (anterolateral border) Paraspinal muscles Platysma / skin Level VI Thyroid cartilage Manubrium Platysma / skin Tracheoesophageal jxn N/A Sternocleidomastoid Level IB Level II Anterior belly of digastric muscle Inner mandible; platysma / skin Sternocleidomastoid