Lung - CS Lymph Nodes

Note 1: Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in CS Mets at DX.
Note 2: If at mediastinoscopy/x-ray, the description is "mass", "adenopathy", or "enlargement" of any of the lymph nodes named as regional in codes 100 and 200, assume that at least regional lymph nodes are involved. If there is any mention of bilateral or contralateral mass, adenopathy or lymph node involvement , use code 600.
Note 3: The words "no evidence of spread" or "remaining examination negative" are sufficient information to consider regional lymph nodes negative in the absence of any statement about nodes.
Note 4: Vocal cord paralysis (resulting from involvement of the recurrent branch of the vagus nerve), superior vena cava (SVC) obstruction, or compression of the trachea or the esophagus, may be related to direct extension of the primary tumor or to lymph node involvement. The treatment options and prognosis associated with these manifestations of disease extent fall within the T4-Stage IIIB category; therefore, generally use CS Extension code 700 for these manifestations and not CS Lymph Nodes . However, if the primary tumor is peripheral and clearly unrelated to vocal cord paralysis, SVC obstruction, or compression of the trachea or the esophagus, code these manifestations as mediastinal lymph node involvement (code 200) in CS Lymph Nodes, unless there is a statement of involvement by direct extension from the primary tumor.

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 nodes, ipsilateral: Bronchial Hilar (bronchopulmonary) (proximal lobar) (pulmonary root) Intrapulmonary nodes, including involvement by direct extension: Interlobar Lobar Segmental Subsegmental Peri/parabronchial Stated as N1 with no other information on regional lymph nodes	N1	N1	RN	RN
200	Regional lymph nodes, ipsilateral: Aortic (above diaphragm), NOS: Peri/para-aortic, NOS: Ascending aorta (phrenic) Subaortic (aortico-pulmonary window) Carinal (tracheobronchial) (tracheal bifurcation) Mediastinal, NOS: Anterior Posterior (tracheoesophageal) Pericardial Peri/paraesophageal Peri/paratracheal, NOS: Azygos (lower peritracheal) Pre- and retrotracheal, NOS: Precarinal Pulmonary ligament Subcarinal Stated as N2 with no other information on regional lymph nodes	N2	N2	RN	RN
500	Regional lymph node(s), NOS	N1	N1	RN	RN
600	Contralateral/bilateral hilar (bronchopulmonary) (proximal lobar) (pulmonary root) Contralateral/bilateral mediastinal Scalene (inferior deep cervical), ipsilateral or contralateral Supraclavicular (transverse cervical), ipsilateral or contralateral Stated as N3 with no other information on regional lymph nodes	N3	N3	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