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 Rules, Section 2.
Note 2: For head and neck schemas, additional information about lymph nodes (size of involved nodes, extracapsular extension, levels involved, and location of involved nodes above or below the lower border of the cricoid cartilage) is coded in CS Site-Specific Factors 1, 3-9.
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 100 in CS Version 1; Supraclavicular nodes were coded 120. Mandibular nodes are included in Facial nodes.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	No regional lymph node involvement	N0	NA	NONE	NONE
100	Positive regional node(s): Level II - Upper jugular: Jugulodigastric (subdigastric) Upper deep cervical Level IIA - Anterior Level IIB - Posterior Level III - Middle jugular: Middle deep cervical Level IV - Lower jugular: Jugulo-omohyoid (supraomohyoid) Lower deep cervical Virchow node Parapharyngeal Retropharyngeal Cervical, NOS Deep cervical, NOS Internal jugular, NOS Regional lymph node(s), NOS	N1	NA	RN	RN
110	Positive regional node(s): Level I: Level IA - Submental Level IB - Submandibular (submaxillary), sublingual Level V - Posterior triangle group: Posterior cervical Level VA - Spinal accessory Level VI - Anterior compartment group: Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Prelaryngeal Pretracheal - above suprasternal notch Recurrent laryngeal	N1	NA	D	RN
120	Positive regional node(s): Level VB - Transverse cervical, supraclavicular (see Note 3) Level VII - 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	N1	NA	D	D
800	Lymph nodes, NOS	N1	NA	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph node(s) cannot be assessed Not documented in patient record	NX	NA	U	U

MelanomaPharynxOther

CS Lymph Nodes