Collaborative Stage

Collaborative Stage for TNM 7 - Revised 09/16/2009 [ Schema ]

CS Extension

Note 1: Substaging of gestational trophoblastic tumors is determined by the value coded in the Prognostic Scoring Index Table, using Site Specific Factor 1. See note in Site Specific Factor 1, Prognostic Index Table to determine the prognostic index score.
Note 2: For this schema, according to AJCC, involvement of genital structures may be either by direct extension or metastasis and is still T2. For Collaborative Staging, metastasis to genital structures should be coded 700 in CS Extension and not coded in CS Mets at DX.

Code	Description	TNM 7 Map	TNM 6 Map	SS77 Map	SS2000 Map
000	In situ: noninvasive; intraepithelial	TX	TX	IS	IS
100	Confined to placenta	T1	T1	L	L
300	Localized, NOS	T1	T1	L	L
350	FIGO Stage I	T1	T1	L	L
400	Adjacent connective tissue, NOS	T2	T2	RE	RE
600	Other genital structures by direct extension or NOS: Broad ligament Cervix Corpus uteri Fallopian tube(s) Genital structures, NOS Ovary(ies) Uterus, NOS Vagina	T2	T2	RE	RE
700	Other genital structures, by metastasis: Broad ligament Cervix Corpus uteri Fallopian tube(s) Genital structures, NOS Ovary(ies) Uterus, NOS Vagina	T2	T2	D	D
800	Further contiguous extension	T2	T2	D	D
850	FIGO Stage II	T2	T2	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

Note: For codes 100 - 850, the substaging is determined by using the Risk Scores in the Prognostic Scoring Index in Site Specific Factor 1 Table.