CS Extension

This input is used for staging

Notes

**Note 1**: For AJCC TNM staging, peritoneal sarcomas are classified as deep tumors. **Note 2**: The assignment of T1 and T2 categories for soft tissue sarcomas is based on tumor size. A physician's statement of the T category may be used to code CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently: for example the record may document size but not extension, other than the physician's statement of the T category. Use codes 350 and 375 as appropriate to code CS Extension based on a statement of T when no other extension information is available.

Default

999

NAACCR Item

NAACCR #2810
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
100 Tumor confined to site of origin Extension Size Extension Size L L
300 Localized, NOS Extension Size Extension Size L L
350 Stated as T1b or T1 [NOS] with no other information on extension Extension Size Extension Size L L
375 Stated as T2b or T2 [NOS] with no other information on extension Extension Size Extension Size L L
400 Adjacent connective tissue
(See definition of adjacent connective tissue in General Rules)		 Extension Size Extension Size RE RE
600 Adjacent organs/structures:
Bone/cartilage
Colon (except ascending and descending colon)
Esophagus
Gallbladder
Liver
Small intestine
Spleen
Stomach		 Extension Size Extension Size RE RE
800 Further contiguous extension, including:
Extension to ascending or descending colon		 Extension Size Extension Size D D
950 No evidence of primary tumor T0 T0 U U
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record		 TX TX U U
- For CS Extension codes 100-800 ONLY, the T category for AJCC 7 staging is assigned based on value of CS Tumor Size, as shown in the Extension Size Table for this schema. - For CS Extension codes 100-800 ONLY, the T category for AJCC 6 staging is assigned based on value of CS Tumor Size, as shown in the Extension Size Table for this schema.