CS Extension: Cervix Uteri

Note: Involvement of anterior and/or posterior septum is coded as involvement of the vaginal wall.

Code	Description	TNM	SS77	SS2000
00	In situ: preinvasive; noninvasive; intraepithelial Cancer in situ with endocervical gland involvement FIGO Stage 0	Tis	IS	IS
01	CIN (Cervical intraepithelial neoplasia) Grade III	Tis	IS	IS
11	Minimal microscopic stromal invasion less than OR equal to 3 mm in depth and less than or equal to 7 mm in horizontal spread FIGO Stage IA1	T1a1	L	L
12	"Microinvasion" Tumor with invasive component greater than 3 mm and less than or equal to 5 mm in depth, taken from the base of the epithelium, and less than or equal to 7 mm in horizontal spread FIGO Stage IA2	T1a2	L	L
20	Invasive cancer confined to cervix AND tumor larger than that in code 12 FIGO Stage IB	*	L	L
25	Invasive cancer confined to cervix and clinically visible lesion	*	L	L
30	Localized, NOS Confined to cervix uteri or uterus, NOS, except corpus uteri, NOS (Not clinically visible or unknown if clinically visible.)	*	L	L
31	FIGO Stage I, not further specified	*	L	L
35	Corpus uteri, NOS	T1NOS	RE	RE
36	Code (35) + (11)	T1a1	RE	RE
37	Code (35) + (12)	T1a2	RE	RE
38	Code (35) + [(20) or (25)]	*	RE	RE
39	Code (35) + [(30) or (31)]	*	RE	RE
40	Extension to: Cul de sac (rectouterine pouch) Upper 2/3's of vagina including fornices Vagina, NOS Vaginal wall, NOS FIGO Stage IIA FIGO Stage II, NOS	T2a	RE	RE
50	Extension to: Ligament(s): Broad Cardinal Uterosacral Parametrium (paracervical soft tissue) FIGO Stage IIB	T2b	RE	RE
60	Extension to: Bladder wall Bladder, NOS excluding mucosa Bullous edema of bladder mucosa Lower 1/3 of vagina Rectal wall Rectum, NOS excluding mucosa FIGO Stage IIIA	T3a	RE	RE
62	Extension to: Ureter, intra- and extramural Vulva FIGO Stage IIIA	T3a	D	RE
63	Tumor causes hydronephrosis or nonfunctioning kidney FIGO Stage IIIB	T3b	RE	RE
65	Extension to pelvic wall(s) (Described clinically as "frozen pelvis", NOS) FIGO Stage IIIB	T3b	D	RE
68	Extension to: Fallopian tube Ovary(ies) Urethra FIGO Stage III, NOS	T3NOS	D	RE
70	Extension to rectal or bladder mucosa (Note: for bullous edema of bladder mucosa, see code 60.) FIGO Stage IVA	T4	D	D
80	Further contiguous extension beyond true pelvis Sigmoid colon Small intestine FIGO Stage IVA, not further specified	T4	D	D
95	No evidence of primary tumor	T0	U	U
99	Unknown extension Primary tumor cannot be assessed Not documented in patient record	TX	U	U

* For Extension codes 20, 25, 30, 31, 38 and 39, the T category is assigned based on the CS Tumor Size, as shown in the Extension Size Table for this site.