SEER Training Modules

Coding CS Reg LNs Positive

This data item records the exact number of regional lymph nodes examined by the pathologist and found to contain metastasis.

This data item is used to derive the AJCC N component of stage grouping for certain primary sites, Summary Stage 1977 and Summary Stage 2000.

Code Description
00 All nodes examined are negative.
01-89 1-89 nodes are positive. (Code exact number of nodes positive)
90 90 or more nodes are positive.
95 Positive aspiration of lymph node(s) was performed.
97 Positive nodes are documented, but the number is unspecified.
98 No nodes were examined.
99 It is unknown whether nodes are positive; not applicable; not stated in patient record.

Click here to see the General Rules for Coding Regional Lymph Nodes Positive.