CS Regular Nodes Evaluation

CS Reg Nodes Eval records how the code for the item "CS Lymph Nodes" was determined based on the diagnostic methods employed.

Code	Description & Staging Basis
0	No regional lymph nodes removed for examination. Evaluation based on physical examination, imaging, or other non-invasive clinical evidence. No autopsy evidence used.
1	No regional lymph nodes removed for examination. Evaluation based on endoscopic examination, diagnostic biopsy including fine needle aspiration of lymph node(s) or other invasive techniques. No autopsy evidence used.
2	No regional lymph nodes removed for examination, but evidence derived from autopsy (tumor was suspected or diagnosed prior to autopsy).
3	Regional lymph nodes removed for examination (removal of at least 1 lymph node) without pre-surgical systemic treatment or radiation OR lymph nodes removed for examination, unknown if pre-surgical systemic treatment or radiation performed.
5	Regional lymph nodes removed for examination with pre-surgical systemic treatment or radiation, and lymph node evaluation based on clinical evidence.
6	Regional lymph nodes removed for examination with pre-surgical systemic treatment or radiation, but lymph node evaluation based on pathologic evidence.
8	Evidence from autopsy; tumor was unsuspected or undiagnosed prior to autopsy.
9	Unknown if lymph nodes removed for examination Not assessed; cannot be assessed Unknown if assessed Not documented in patient record For sites that have no TNM staging: Not applicable.