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: 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: Retropharyngeal nodes have been moved from code 120 in CS Version 1 to code 050. Sipinal accessory nodes have been moved from code 750 to code 110. Lower deep cervical and transverse cervical nodes have been moved from code 750 to code 120. Mandibular nodes are included with Facial nodes.

^ For CS Lymph Nodes codes 105, 115, 125-190, 205, 215, 225, 290, 305, 315, 325, 405, 415, 425, 490, 505, 515, 525-700 ONLY, the N category for AJCC 7 staging is assigned based on the value of CS Site-Specific Factor 1, Size of Lymph Nodes, as shown in the Lymph Nodes Size Table CSv2 for this schema.
* For CS Lymph Nodes codes 105, 115, 125-190, 205, 215, 225, 290, 305, 315, 325, 405, 415, 425, 490, 505, 515, and 525-700 ONLY, the N category for AJCC 6 staging is assigned based on the value of CS Site-Specific Factor 1, Size of Lymph Nodes, as shown in the 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 6 staging for cases collected in CSv1 is assigned based on the value of CS Site-Specific Factor 1, Size of Lymph Nodes, as shown in the Lymph Nodes Size Table CSv1, for this schema.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	No regional lymph node involvement	N0	N0	NONE	NONE
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	Single positive ipsilateral regional node: Level II - Upper jugular: Jugulodigastric (subdigastric) Upper deep cervical Level IIA - Anterior Level IIB - Posterior Retropharyngeal 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	Single positive ipsilateral regional node: Level I: Level IA - Submental Level IB - Submandibular (submaxillary), sublingual Level VA - 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
125	Single positive ipsilateral regional node: Level III - Middle jugular: Middle deep cervical Level IV - Lower jugular: Jugulo-omohyoid (suyporaomohyoid) Lower deep cervical Virchow node Level V - Posterior triangle group: Posterior cervical Level VB - Transverse cervical, supraclavicular (see Note 4) Level VI - Anterior compartment group: Laterotracheal Paralaryngeal Paratracheal - above suprasternal notch Perithyroidal Precricoid (Delphian) Prelaryngeal Pretracheal - above suprasternal notch Recurrent laryngeal 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 Parapharyngeal Retroauricular(mastoid) Suboccipital	^	*	D	D
180	Stated as N1 with no other information on regional lymph nodes	^	*	RN	RN
190	Stated as N2a with no other information on regional lymph nodes	^	*	RN	RN
200	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 100	ERROR	**	RN	RN
205	Multiple positive ipsilateral nodes listed in code 105	^	*	RN	RN
210	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 110	ERROR	**	RN	RN
215	Multiple positive ipsilateral nodes, any listed in code 115 WITH or WITHOUT nodes listed in code 105	^	*	D	RN
220	OBSOLETE DATA RETAINED V0200 Multiple positive ipsilateral nodes listed in code 120	ERROR	**	D	D
225	Multiple positive ipsilateral nodes, any listed in code 125 WITH or WITHOUT nodes listed in code 105 or 115	^	*	D	D
290	Stated as N2b with no other information on regional lymph nodes	^	*	D	D
300	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 100: Positive ipsilateral node(s), not stated if single or multiple	ERROR	**	RN	RN
305	Positive ipsilateral node(s) listed in code 105, not stated if single or multiple	^	*	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	**	D	RN
315	Positive ipsilateral node(s) listed in code 115, not stated if single or multiple	^	*	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	**	D	D
325	Positive ipsilateral node(s) listed in code 125, not stated if single or multiple	^	*	D	D
400	OBSOLETE DATA RETAINED V0200 Regional lymph nodes listed in code 100: Positive bilateral nodes	ERROR	**	RN	RN
405	Positive bilateral or contralateral nodes listed in code 105	^	*	RN	RN
410	OBSOLETE DATA RETAINED V0200 Regional lymph nodes listed in code 110: Positive bilateral nodes	ERROR	**	D	RN
415	Positive bilateral or contralateral nodes, any listed in code 115 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
425	Positive bilateral or contralateral nodes, any listed in code 125 WITH or WITHOUT nodes listed in code 105 or 115	^	*	D	D
490	Stated as N2c with no other information on regional lymph nodes	^	*	RN	RN
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	Positive node(s) lsited in code 105, not stated if ipsilateral, or bilateral, or contralateral, AND not stated if single or multiple	^	*	RN	RN
510	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 110: Positive node(s), not stated if unilateral, or bilateral	ERROR	**	D	RN
515	Positive node(s) listed in code 115, not stated if ipsilateral, or bilateral, or contralateral, AND not stated if single or multiple	^	*	D	RN
520	OBSOLETE DATA RETAINED V0200 Regional lymph nodes as listed in code 120: Positive node(s), not stated if unilateral or bilateral	ERROR	**	D	D
525	Positive node(s) listed in code 125, not stated if ipsilateral, or bilateral, or contralateral, AND not stated if single or multiple	^	*	D	D
600	Stated as N2 [NOS] with no other information on regional lymph nodes	^	*	RN	RN
700	Stated as N3 with no other information on regional lymph nodes	^	*	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	N1	N1	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph node(s) cannot be assessed Not documented in patient record	NX	NX	U	U

PharyngealTonsil

CS Lymph Nodes