Collaborative Stage

Note 1: For head and neck schemas, this field includes all lymph nodes defined as Levels I-VII and Other by AJCC. The complete definitions are provided in the General Instructions.
Note 2: For head and neck schemas, additional information about lymph nodes (size of involved nodes, extracapsular extension, and levels involved) is coded in Site-Specific Factors 1-6.
Note 3: For head and neck cancers, if lymph nodes are described only as "supraclavicular", try to determine if they are in Level IV (deep to the sternocleidomastoid muscle, in the lower jugular chain) or Level V (in the posterior triangle, inferior to the transverse cervical artery) and code appropriately. If the specific level cannot be determined, consider them as Level V nodes.
Note 4: The description of lymph nodes has been standardized across the head and neck schemas. All lymph node levels and groups listed here are considered regional nodes for AJCC staging. Summary Stage 1977 and Summary Stage 2000 divide these nodes into regional and distant groups.
Note 5: All regional nodes except Supraclavicular nodes were coded in 100 in CSv1, Supraclavicular nodes were coded 120.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	None; no regional lymph node involvement	NA	NA	NONE	NONE
100	Regional lymph node(s) bilateral and/or contralateral: Level II node - Upper jugular Jugulodigastric (subdigastric) Upper deep cervical Level III node - Middle jugular Middle deep cervical Level IV node - Lower jugular Lower deep cervical Virchow node Other groups: Parapharyngeal Retropharyngeal Cervical, NOS Deep cervical, NOS Internal jugular, NOS Regional lymph node, NOS	NA	NA	RN	RN
110	Regional lymph node(s) bilateral and/or contralateral: Level I node Level IA - Submental Level IB - Submandibular (submaxillary), sublingual Level V node - Posterior triangle group Posterior cervical Level VA - Spinal accessory Level VI node - Anterior compartment group Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Prelaryngeal Pretracheal - above suprasternal notch Recurrent laryngeal	NA	NA	D	RN
120	Regional lymph node(s) bilateral and/or contralateral: Level VB - Transverse cervical, supraclavicular (see Note 3) Level VII node - Superior mediastinal group (for other mediastinal nodes see CS Mets at DX) Esophageal groove Paratracheal - below suprasternal notch Pretracheal - below suprasternal notch Other groups: Facial: Buccinator (buccal) Mandibular Nasolabial Parotid: Infraauricular Intraparotid Periparotid Preauricular Retroauricular (Mastoid) Suboccipital	NA	NA	D	D
800	Lymph nodes, NOS	NA	NA	RN	RN
999	Unknown; not stated Regional lymph node(s) cannot be assessed Not documented in patient record	NA	NA	U	U

PharynxOther

CS Lymph Nodes