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.