Collaborative Stage

Note 1: Distant lymph node involvement, considered N2 for AJCC 7 staging for retinoblastoma, is coded in CS Lymph Nodes. Distant lymph node involvement was considered M1 for AJCC 6 staging, and was coded in CS Mets at DX in CS Version 1.
Note 2: When coding Regional Nodes Positive and Regional Nodes Examined, only include regional nodes. Do not include distant nodes coded in CS Lymph Nodes. If the only information available is for Lymph Nodes, NOS, coded as 800 in CS Lymph Nodes, assume these are regional nodes for coding Regional Nodes Positive and Regional Nodes Examined.

* For CS Lymph Nodes codes 200 and 250 ONLY, the N category and M categories for AJCC 6 staging are assigned based on the values of CS Lymph Nodes, CS Lymph Nodes Eval, CS Mets at DX, and CS Mets Eval as shown in the Lymph Nodes Mets at DX AJCC 6 Table 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	Regional lymph node(s): Cervical Parotid (preauricular) Submandibular Regional lymph node(s), NOS Stated as N1 with no other information on regional lymph nodes	N1	N1	RN	RN
200	Distant lymph nodes Stated as N2 with no other information on regional lymph nodes	N2	*	D	D
250	200 + 100	N1	*	D	D
800	Lymph nodes, NOS	N1	N1	RN	RN
999	Unknown; regional lymph nodes not stated Regional lymph nodes cannot be assessed Not documented in patient record	NX	NX	U	U

CS Lymph Nodes