Collaborative Stage

Collaborative Stage for TNM 7 - Revised 11/13/2009 [ Schema ]

Bone

CS Extension

Note: The cortex of a bone is the dense outer shell that provides strength to the bone; the spongy center of a bone is the cancellous portion. The periosteum of the bone is the fibrous membrane covering of a bone that contains the blood vessels and nerves; the periosteum is similar to the capsule on a visceral organ.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
100	Invasive tumor confined to cortex of bone	^	*	L	L
200	Extension beyond cortex to periosteum (no break in periosteum)	^	*	L	L
300	Localized, NOS	^	*	L	L
310	Stated as T1 with no other information on extension	^	*	L	L
350	Stated as T2 with no other information on extension	^	*	L	L
400	Extension beyond periosteum to surrounding tissues, including adjacent skeletal muscle(s)	^	*	RE	RE
600	Adjacent bone/cartilage	^	*	RE	RE
700	Skin	^	*	D	D
800	Further contiguous extension	^	*	D	D
820	Skip metastases or discontinuous tumors in the same bone	T3	T3	D	D
950	No evidence of primary tumor	T0	T0	U	U
999	Unknown extension Primary tumor cannot be assessed Not documented in patient record	TX	TX	U	U

* For codes 100, 200, 300, 310, 350, 400, 600, 700, and 800 ONLY, the T category is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this site.
^ For codes 100, 200, 300, 310, 350, 400, 600, 700, and 800 ONLY, the T category is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this site.