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Cervical lymph nodes are lymph nodes found in the neck. ==Structure== There are approximately 300 lymph nodes in the neck, and they can be classified in many different ways. Commonly used systems have been devised by the American Academy of Otolaryngology and the American Joint Committee on Cancer. One system divides the nodes as follows:〔(archotol.ama-assn.org )〕 * Level I: Submental and submandibular nodes * * Level Ia: Submental - found between the anterior belly of the digastric muscles * * Level Ib: Submandibular triangle - found around submandibular glands in submandibular space * Level II: Upper jugular nodes - Between posterior belly of digastric muscles superiorly and hyoid bone inferiorly * * Level IIa: Anterior, medial, lateral or posterior to internal jugular vein, or if posterior, must not have an intervening fat plane * * Level IIb: Posterior to internal jugular vein with fat plane between nodes and internal jugular vein * Level III: Middle jugular nodes - between the hyoid bone and cricoid cartilage * Level IV: Lower jugular nodes - between the cricoid cartilage and the clavicle * Level V: Posterior cervical or spinal accessory nodes, posterior to the sternocleidomastoid muscle * * Level VA: Spinal accessory nodes from skull base to bottom of cricoid cartilage * * Level VB: Spinal accessory nodes between cricoid and clavicle * Level VI: Visceral space lymph nodes - midline group of cervical nodes from hyoid to sternal manubrium, includes prelaryngeal, pretracheal, and paratracheal subgroups * Level VII: Superior mediastinal nodes - between carotid arteries from top of manubrium superiorly to innominate vein inferiorly 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cervical lymph nodes」の詳細全文を読む スポンサード リンク
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