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 cricoids cartilage) is coded in CS Site-Specific Factors 1-7.
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: Level III and Level IV nodes have been moved from code 100 in CS Version 1 to code 110. Mandibular nodes are included with 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 VI - Anterior compartment group: Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Pretracheal - above suprasternal notch Recurrent laryngeal 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 III - Middle jugular: Middle deep cervical Level IV - Lower jugular: Jugulo-omohyoid (supraomohyoid) Lower deep cervical Virchow node Retropharyngeal	N1	NA	D	RN
120	Positive regional node(s): Level V - Posterior triangle group: Level VA - Spinal accessory 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 Preparotid Parapharyngeal Retroauricular (mastoid) Suboccipital	N1	NA	D	D
180	Stated as N1 with no other information on regional lymph nodes	N1	NA	RN	RN
190	OBSOLETE DATA RETAINED V0200 Stated as N2a, no other information	ERROR	NA	RN	RN
200	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 100	ERROR	NA	RN	RN
210	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 110	ERROR	NA	D	RN
220	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 120	ERROR	NA	D	D
290	OBSOLETE DATA RETAINED V0200 Stated as N2b, no other information	ERROR	NA	RN	RN
300	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 100: Positive ipsilateral node(s), not stated if single or multiple	ERROR	NA	RN	RN
310	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 110 Positive ipsilateral node(s), not stated if single or multiple	ERROR	NA	D	RN
320	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 120: Positive ipsilateral node(s), not stated if single or multiple	ERROR	NA	D	D
400	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 100: Positive bilateral or contralateral nodes	ERROR	NA	RN	RN
410	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 110 Positive bilateral or contralateral nodes	ERROR	NA	D	RN
420	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 120: Positive bilateral or contralateral nodes	ERROR	NA	D	D
490	OBSOLETE DATA RETAINED V0200 Stated as N2c, no other information	ERROR	NA	RN	RN
500	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 100: Positive node(s), not stated if ipsilateral, or bilateral, or contralateral, AND not stated if single or multiple	ERROR	NA	RN	RN
510	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 110 Positive node(s), not stated if ipsilateral, or bilateral, or contralateral AND not stated if single or multiple	ERROR	NA	D	RN
520	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 120: Positive node(s), not stated if ipsilateral, or bilateral, or contralateral, AND not stated if single or multiple	ERROR	NA	D	D
600	OBSOLETE DATA RETAINED V0200 Stated as N2, NOS	ERROR	NA	RN	RN
700	OBSOLETE DATA RETAINED V0200 Stated as N3, no other information	ERROR	NA	RN	RN
800	Lymph nodes, NOS	N1	NA	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph nodes cannot be assessed Not documented in patient record	NX	NA	U	U

MelanomaLarynxOther

CS Lymph Nodes