CS Extension

Notes

**Note 1**: An E lesion is defined as disease that involves extralymphatic site(s), or sites other than lymph nodes and other lymphatic structures. Other lymphatic structures include spleen (see note 4), thymus gland (C37.9), and Waldeyer's ring (tonsils) (C02.4, C09.0-C09.9, C11.1, C14.2),. Any lymphatic structure (other than spleen) is coded the same as a lymph node region (codes 100, 200, 300). **Note 2**: While spleen is considered a lymphatic structure, it is coded separately (see codes 120, 220, 230, 320, 330). S equals spleen involvement. **Note 3**: If there is no mention of lymphatic or extralymphatic involvement but several diagnostic procedures were done, interpret as no involvement. **Note 4**: Involvement of adjacent soft tissue does not alter the classification.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
100 Involvement of a single lymph node region

Stated as Stage I
NA NA L L
110 Localized involvement of a single extralymphatic organ/site in the absence of any lymph node involvement
Multifocal involvement of one extralymphatic organ/site

Stated as Stage IE
NA NA L L
120 Involvement of spleen only

Stated as Stage IS
NA NA L L
200 Involvement of two or more lymph node regions on the SAME side of the diaphragm

Stated as Stage II
NA NA RNOS RNOS
210 Localized involvement of a single extralymphatic organ/site
WITH involvement of its regional lymph node(s)
WITH or WITHOUT involvement of other lymph node(s) on the SAME side of the diaphragm

Direct extension to adjacent organs or tissues

Stated as Stage IIE
NA NA RNOS RNOS
220 Involvement of spleen
PLUS lymph node(s) BELOW the diaphragm

Stated as Stage IIS
NA NA RNOS RNOS
230 Involvement of spleen
PLUS involvement of a single extralymphatic organ/site BELOW the diaphragm
WITH/WITHOUT involvement of lymph node(s) BELOW the diaphragm

Stated as Stage IIES
NA NA RNOS RNOS
300 Involvement of lymph node regions on BOTH sides of the diaphragm

Stated as Stage III
NA NA D D
310 Involvement of an extralymphatic organ/site
PLUS involvement of lymph node(s) on the OPPOSITE side of the diaphragm

Stated as Stage IIIE
NA NA D D
320 Involvement of the spleen
PLUS lymph node(s) ABOVE the diaphragm

Involvement of spleen
PLUS lymph nodes on both sides of the diaphragm.

Stated as Stage IIIS
NA NA D D
330 320 + 310

Involvement of the spleen
PLUS a single extralymphatic site ABOVE the diaphragm
WITH or WITHOUT involvement of lymph node(s)

Involvement of the spleen
PLUS involvement of lymph node region(s) ABOVE the diaphragm
PLUS involvement of a single extralymphatic organ/site on either side of the diaphragm

Stated as Stage IIIES
NA NA D D
800 Diffuse or disseminated (multifocal) involvement of ONE OR MORE extralymphatic organ(s)/site(s)
WITH OR WITHOUT associated lymph node involvement

Multifocal involvement of MORE THAN ONE extralymphatic organ/site

Involvement of isolated extralymphatic organ in absence of involvement of
adjacent lymph nodes, but in conjunction with disease in distant sites

Metastasis/involvement:
Bone marrow
Liver
Nodular involvement of lung(s)

Stated as Stage IV
NA NA D D
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record
NA NA U U
- AJCC stage group for this schema is derived directly from CS Extension and CS Site-Specific Factor 2, as shown in the AJCC TNM 7 Stage table. The AJCC Stage Groups I-IV are subdivided into A and B based on the presence or absence of symptoms coded in CS Site-Specific Factor 2. - AJCC stage group for this schema is derived directly from CS Extension and CS Site-Specific Factor 2, as shown in the AJCC TNM 6 Stage table. The AJCC Stage Groups I-IV are subdivided into A and B based on the presence or absence of symptoms as coded in CS Site-Specific Factor 2.