CS Extension

Notes

**Note 1**: For AJCC TNM staging, sarcomas of the heart and mediastinum 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.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
100 Invasive 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:
For heart:
Visceral pericardium (epicardium)
(See definition of adjacent connective tissue in General Rules)
Extension Size Extension Size RE RE
600 Adjacent organs/structures:
For hHeart:
Ascending aorta
Parietal pericardium
Vena cava
For mediastinum:
Descending aorta
Esophagus
Large (named) artery(ies)
Large (named) vein(s)
Pericardium, NOS
Parietal
Visceral (epicardium)
Phrenic nerve(s)
Pleura, NOS
Parietal pleura
Visceral pleura of lung
Sternum
Sympathetic nerve trunk(s)
Thoracic duct
Thymus
Trachea, parietal pleura
Vertebra(e)
Extension Size Extension Size RE RE
800 Further contiguous extension 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.