Peritoneum - CS Extension

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.

^ 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.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
100	Tumor confined to site of origin	^	*	L	L
300	Localized, NOS	^	*	L	L
350	Stated as T1b or T1 [NOS] with no other information on extension	^	*	L	L
375	Stated as T2b or T2 [NOS] with no other information on extension	^	*	L	L
400	Adjacent connective tissue (See definition of adjacent connective tissue in General Rules)	^	*	RE	RE
600	Adjacent organs/structures: Bone/cartilage Colon (except ascending and descending colon) Esophagus Gallbladder Liver Small intestine Spleen Stomach	^	*	RE	RE
800	Further contiguous extension, including: Extension to ascending or descending colon	^	*	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