Collaborative Stage

Note 1: Only include information from imaging and physical examination in this item. Do not include information on regional lymph nodes that is based on surgical observation or diagnostic lymph node biopsy.
Note 2: Use code 400 if nodes are involved clinically but there is no indication of number of nodes involved. Do not use nodal involvement determined pathologically to code this data item.
Note 3: If there is no diagnostic work-up to assess regional lymph nodes, use code 999. Do not apply the inaccessible nodes rule that presumes unmentioned nodes to be negative.

Code	Description
000	Nodes not clinically evident; imaging of regional nodes was done, and nodes were not mentioned
100	Metastasis in 1 to 6 regional lymph nodes, determined clinically
200	Metastasis in 7 to 15 regional lymph nodes, determined clinically
300	Metastasis in more than 15 regional lymph nodes, determined clinically
400	Clinically positive regional nodes, NOS
888	OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.)
999	Regional lymph nodes involved pathologically, clinical assessment not stated Unknown if regional lymph nodes clinically evident Not documented in patient record

CS Site-Specific Factor 1
Clinical Assessment of Regional Lymph Nodes