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, levels involved, and location of involved nodes above or below the lower border of the cricoid cartilage) is coded in Site-Specific Factors 1,3-9.
Note 3: If laterality of lymph nodes is not specified, assume nodes are unilateral. Midline nodes are considered unilateral.
Note 4: 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 5: 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 6: Most codes from CSV1 have been made obsolete and new codes added, to support AJCC assignment of N values for nasopharynx, which differs from the pattern for other head and neck sites.

^ For codes 050-070, 105, 115, 130, 405, 415, 430, 505, 515, 530, and 800 ONLY, the N category for AJCC 7th Edition staging is assigned based on the value of Site-Specific Factor 1, Size of Lymph Nodes, using the extra table, Lymph Nodes Size Table CSv2, for this schema.
* For codes 050-070, 105, 115, 130, 405, 415, 430, 505, 515, 530, and 800 ONLY, the N category for AJCC 6th Edition staging is assigned based on the value of Site-Specific Factor 1, Size of Lymph Nodes, using the extra table, Lymph Nodes Size Table CSv2, for this schema.
**For OBSOLETE codes 100, 110, 120, 200, 210, 220, 300, 310, 320, 400, 410, 420, 500, 510, 520, and 750 ONLY, the N category for AJCC 6th Edition staging for cases collected in CSv1 is assigned based on the value of Site-Specific Factor 1, Size of Lymph Nodes, using the extra table, Lymph Nodes Size Table CSv1, for this schema.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	None; no regional lymph node involvement	N0	N0	NONE	NONE
050	Unilateral positive regional node(s): Retropharyngeal	^	*	RN	RN
060	Positive bilateral nodes Retropharyngeal	^	*	RN	RN
070	Positive nodes, not stated if unilateral or bilateral Retropharyngeal	^	*	RN	RN
100	OBSOLETE DATA RETAINED V0200 Single positive ipsilateral regional node: Level II node Jugulodigastric (subdigastric) Upper deep cervical Upper jugular Level III node Middle deep cervical Mid jugular Level IV node Lower deep cervical Lower jugular Retropharyngeal Cervical, NOS Deep cervical, NOS Internal jugular, NOS Mandibular Regional lymph node, NOS	ERROR	**	RN	RN
105	Unilateral positive regional node(s): Level II node - Upper jugular Jugulodigastric (subdigastric) Upper deep cervical Cervical, NOS Deep cervical, NOS Internal jugular, NOS Regional lymph node, NOS	^	*	RN	RN
110	OBSOLETE DATA RETAINED V0200 Single positive ipsilateral regional node: Level I node Submandibular (submaxillary) Submental	ERROR	**	D	RN
115	Unilateral positive regional node(s): Level I node Level IA - Submental Level IB - Submandibular (submaxillary), sublingual Level VA Node - Spinal accessory	^	*	D	RN
120	OBSOLETE DATA RETAINED V0200 Single positive ipsilateral regional node: Level V node Posterior cervical Posterior triangle (spinal accessory and transverse cervical) (upper, middle, and lower corresponding to the levels that define upper, middle, and lower jugular nodes) Level VI node Anterior deep cervical Laterotracheal Paralaryngeal Paratracheal Prelaryngeal Pretracheal Recurrent laryngeal Level VII node Upper mediastinum (for other mediastinal nodes see CS Mets at DX) Other groups Intraparotid Parapharyngeal Periparotid Retropharyngeal Sub-occipital Supraclavicular fossa	ERROR	**	D	D
130	Unilateral positive regional node(s): Level III node - Middle jugular Middle deep cervical Level VI node - Anterior compartment group Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Prelaryngeal Pretracheal - above suprasternal notch Recurrent laryngeal Other groups: Facial: Buccinator (buccal) Mandibular Nasolabial Parotid: Infraauricular Intraparotid Periparotid Preauricular Parapharyngeal Retroauricular (mastoid) Suboccipital	^	*	D	D
180	Stated as N1, no other information	N1	N1	RN	RN
200	OBSOLETE DATA RETAINED V0200 See code 100 Multiple positive ipsilateral nodes listed in code 10	ERROR	**	RN	RN
210	OBSOLETE DATA RETAINED V0200 See code 110 Multiple positive ipsilateral nodes listed in code 11	ERROR	**	D	RN
220	OBSOLETE DATA RETAINED V0200 See code 120 Multiple positive ipsilateral nodes listed in code 12	ERROR	**	D	D
300	OBSOLETE DATA RETAINED V0200 See code 100 Regional lymph nodes as listed in code 10: Positive ipsilateral node(s), not stated if single or multiple	ERROR	**	RN	RN
310	OBSOLETE DATA RETAINED V0200 See code 110 Regional lymph nodes as listed in code 11: Positive ipsilateral node(s), not stated if single or multiple	ERROR	**	D	RN
320	OBSOLETE DATA RETAINED V0200 See code 120 Regional lymph nodes as listed in code 12: Positive ipsilateral node(s), not stated if single or multiple	ERROR	**	D	D
400	OBSOLETE DATA RETAINED V0200 Regional lymph nodes listed in code 100: Positive bilateral nodes	ERROR	**	RN	RN
405	Regional lymph nodes as listed in code 105: Positive bilateral nodes	^	*	RN	RN
410	OBSOLETE DATA RETAINED V0200 Regional lymph nodeslisted in code 110: Positive bilateral nodes	ERROR	**	D	RN
415	Regional lymph nodes any listed in code 115: Positive bilateral nodes (WITH or WITHOUT nodes listed in code 105)	^	*	D	RN
420	OBSOLETE DATA RETAINED V0200 Regional lymph nodes listed in code 120: Positive bilateral nodes	ERROR	**	D	D
430	Regional lymph nodes any listed in code 130: Positive bilateral nodes (WITH or WITHOUT nodes listed code 105 or 115)	^	*	D	D
500	OBSOLETE DATA RETAINED V0200 Regional lymph nodes listed in code 100: Positive node(s), not stated if unilateral, or bilateral	ERROR	**	RN	RN
505	Regional lymph nodes as listed in code 105: Positive node(s), not stated if unilateral, or bilateral	^	*	RN	RN
510	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 11: Positive node(s), not stated if unilateral, or bilateral	ERROR	**	D	RN
515	Regional lymph nodes as listed in code 115: Positive node(s), not stated if unilateral, or bilateral	^	*	D	RN
520	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 12: Positive node(s), not stated if unilateral or bilateral	ERROR	**	D	D
530	Regional lymph nodes as listed in code 130 Positive node(s), not stated if unilateral or bilateral	^	*	D	D
600	Stated as N2, no other information	N2	N2	RN	RN
620	Stated as N3a, no other information	N3a	N3a	RN	RN
650	Unilateral or bilateral positive regional node(s): Level IV node - Lower jugular Lower deep cervical Virchow node Level VB - Transverse cervical, supraclavicular (see Note 4 Level VII node - Superior mediastinal group (for other mediastinal nodes see CS Mets at DX) Esophageal groove Paratracheal - below suprasternalnotch Pretracheal - below suprasternal notch Stated as N3b, no other information	N3b	N3b	D	D
700	Stated as N3 NOS, no other information	N3NOS	N3NOS	RN	RN
750	OBSOLETE DATA RETAINED V0200 Regional lymph nodes in the supraclavicular fossa: Inferior deep cervical (scalene) Spinal accessory (posterior cervical) Supraclavicular (transverse cervical) (See Note 4)	ERROR	**	D	D
800	Lymph nodes, NOS, no other information	^	*	RN	RN
999	Unknown; not stated Regional lymph node(s) cannot be assessed Not documented in patient record	NX	NX	U	U

Nasopharynx

CS Lymph Nodes