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 ipsilateral. Midline nodes are considered ipsilateral.
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: Level II nodes moved from code 100 in CSV1 to code 120.

^ For codes 100-120, 200-220, 300-320, 400-420, 500-520, 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 for this site.
* For codes 100-120, 200-220, 300-320, 400-420, 500-520, 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 for this site.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	None; no regional lymph node involvement	N0	N0	NONE	NONE
100	Single positive ipsilateral regional node: Level III node - Middle jugular Middle deep cervical Level IV node - Lower jugular Lower deep cervical Virchow node Retropharyngeal Cervical, NOS Deep cervical, NOS Internal jugular, NOS Regional lymph node, NOS	^	*	RN	RN
110	Single positive ipsilateral regional node: Level I node Level IA - Submental Level IB - Submandibular (submaxillary), sublingual Level VI node Anterior compartment group Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Prelaryngeal Pretracheal - above suprasternal notch Recurrent laryngeal Other groups: Parapharyngeal	^	*	D	RN
120	Single positive ipsilateral regional node: Level II node - Upper jugular Jugulodigastric (subdigastric) Upper deep cervical Level IIA Level IIB Level V node - Posterior triangle group Posterior cervical Level VA - Spinal accessory 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 suprasternal notch Pretracheal - below suprasternal notch Other groups: Facial: Buccinator (buccal) Mandibular Nasolabial Parotid: Infraauricular Intraparotid Periparotid Preauricular Retroauricular (mastoid) Suboccipital	^	*	D	D
180	Stated as N1, no other information	N1	N1	RN	RN
190	Stated as N2a, no other information	N2a	N2a	RN	RN
200	Multiple positive ipsilateral nodes listed in code 100	^	*	RN	RN
210	Multiple positive ipsilateral nodes, any listed in code 110 (WITH or WITHOUT nodes listed in code 100)	^	*	D	RN
220	Multiple positive ipsilateral nodes, any listed in code 120 (WITH or WITHOUT nodes listed in code 100 or 110)	^	*	D	D
290	Stated as N2b, no other information	N2b	N2b	RN	RN
300	Regional lymph nodes listed in code 100: Positive ipsilateral node(s), not stated if single or multiple	^	*	RN	RN
310	Regional lymph nodes listed in code 110: Positive ipsilateral node(s), not stated if single or multiple	^	*	D	RN
320	Regional lymph nodes listed in code 120: Positive ipsilateral node(s), not stated if single or multiple	^	*	D	D
400	Regional lymph nodes listed in code 100: Positive bilateral or contralateral nodes	^	*	RN	RN
410	Regional lymph nodes, any listed in code 110: Positive bilateral or contralateral nodes (WITH or WITHOUT nodes listed in code 100 or 110)	^	*	D	RN
420	Regional lymph nodes, any listed in code 120: Positive bilateral or contralateral nodes (WITH or WITHOUT nodes listed in code 100 or 110)	^	*	D	D
490	Stated as N2c, no other information	N2c	N2c	RN	RN
500	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	^	*	RN	RN
510	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	^	*	D	RN
520	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	^	*	D	D
600	Stated as N2, NOS	N2NOS	N2NOS	RN	RN
700	Stated as N3, no other information	N3	N3	RN	RN
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

Hypopharynx

CS Lymph Nodes