CS Extension

This input is used for staging

Notes

**Note 1**: Adenosarcomas of the corpus uteri were not staged in AJCC 6. **Note 2**: When both FIGO stage and extension detail are available, record the code with extension detail in preference to a statement of FIGO stage. **Note 3**: FIGO and AJCC 7 stage do not include Tis for this site and histology. Any cases with a CS Extension code of 000 will derive TX for AJCC 7 staging, though In Situ will be derived Summary Stage. **Note 4**: FIGO Stage IV, NOS is assigned based on tumor extension and/or metastasis. Code CS Extension based on a physician's statement of FIGO Stage IV, NOS only if it is known that the stage value is assigned because of tumor extension. **Note 5**: Positive cytology should be reported in CS Site-Specific Factor 2. It is not a staging element for AJCC 7 staging, but is a staging element for Summary Stage. Since "cancer cells in ascites or in peritoneal washings" was not specifically categorized in the 1977 Summary Staging Guide, is unclear to which stage previous cases may have been coded in that staging system. **Note 6**: According to the AJCC, extension to the bowel or bladder mucosa must be proven by biopsy in order to rule out bullous edema.

Default

999

NAACCR Item

NAACCR #2810
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive, preinvasive TX NA IS IS
100 Invasive cancer confined to corpus uteri T1NOS NA Extension Cytology Summary Stage Extension Cytology Summary Stage
110 Confined to endometrium
(Glandular, stromal or both)
T1a NA Extension Cytology Summary Stage Extension Cytology Summary Stage
113 Confined to endocervix
(Glandular, stromal, or both)
T1a NA RE RE
115 FIGO Stage IA T1a NA Extension Cytology Summary Stage Extension Cytology Summary Stage
120 Tumor invades less than one-half of myometrium
Invasion of inner half of myometrium
T1b NA Extension Cytology Summary Stage Extension Cytology Summary Stage
123 Invasion of less than one-half of myometrium
WITH involvement of endocervix
T1b NA RE RE
125 FIGO Stage IB T1b NA Extension Cytology Summary Stage Extension Cytology Summary Stage
130 Tumor invades one-half or more of myometrium
Invasion of outer half of myometrium
T1c NA Extension Cytology Summary Stage Extension Cytology Summary Stage
133 Invasion of one-half or more of myometrium
WITH involvement of endocervix
T1c NA RE RE
135 FIGO Stage IC T1c NA Extension Cytology Summary Stage Extension Cytology Summary Stage
140 Invasion of myometrium, NOS T1NOS NA Extension Cytology Summary Stage Extension Cytology Summary Stage
143 Invasion of myometrium, NOS
WITH involvement of endocervix
T1NOS NA RE RE
160 Tunica serosa of the visceral peritoneum (serosa covering the corpus) T1NOS NA Extension Cytology Summary Stage Extension Cytology Summary Stage
170 FIGO Stage I [NOS] T1NOS NA Extension Cytology Summary Stage Extension Cytology Summary Stage
400 Localized, NOS T1NOS NA Extension Cytology Summary Stage Extension Cytology Summary Stage
500 Cervix uteri, NOS, but not beyond uterus T1NOS NA RE RE
510 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 113, 123, 133, and 143

Endocervical glandular involvement only
T1a NA RE RE
520 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 113, 123, 133, and 143

Cervical stromal invasion
T1a NA RE RE
550 Adnexal involvement, NOS
Extension or metastasis within true pelvis:
Adnexa
Fallopian tube(s)
Ligaments:
Broad
Round
Uterosacral
Ovary(ies)
Parametrium
Visceral peritoneum of pelvic organs excluding serosa of corpus uteri
T2a NA RE RE
600 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 160, 550, 655, 665, and 688

Adnexal involvement, NOS
Extension or metastasis within true pelvis:
Adnexa
Fallopian tube(s)
Ligaments: Broad, round, uterosacral
Ovary(ies)
Parametrium
Pelvic serosa
Tunica serosa (parietal lining of the pelvic or abdominal cavity)
T2a NA RE RE
605 FIGO Stage IIA T2a NA RE RE
610 OBSOLETE DATA RETAINED V0200
See Note 4 and CS Site-Specific Factor 2

Cancer cells in ascites
Cancer cells in peritoneal washings FIGO Stage IIIA
ERROR: NA RE RE
620 OBSOLETE DATA CONVERTED V0203
See code 645

Ureter
Vulva
ERROR: ERROR: ERROR: ERROR:
640 Extension or metastasis to vagina T2b NA D RE
645 Extension or metastasis to:
Ureter
Vulva
T2b NA D RE
650 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 655 and 662

Extension or metastasis to pelvic wall(s)
Described clinically as "frozen pelvis", NOS
T2b NA RE RE
655 Extension or metastasis to:
Pelvic wall(s)
Parietal serosa of pelvic cavity
T2b NA RE RE
660 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 705 and 708

Extension or metastasis to:
Bladder wall
Bladder, NOS excluding mucosa
Rectal wall
Rectum, NOS excluding mucosa
T4 NA RE RE
662 Described clinically as "frozen pelvis", NOS T2b NA D RE
663 (655 or 662) + (640 or 645) T2b NA D RE
665 Extension or metastasis to:
Cul de sac (rectouterine pouch)
T2b NA RE RE
670 OBSOLETE DATA RETAINED AND REVIEWED V0203
See code 663 and 705

[(650) or (660)] and [(620) or (640)]
T2b NA D RE
675 FIGO Stage IIB T2b NA RE RE
680 OBSOLETE DATA CONVERTED V0203
See code 683

FIGO Stage II [NOS]
ERROR: ERROR: ERROR: ERROR:
682 Extension beyond uterus, within pelvis, NOS T2NOS NA RE RE
683 FIGO Stage II [NOS] T2NOS NA RE RE
685 OBSOLETE DATA REVIEWED V0203
See codes 665 and 688

Contiguous extension to abdominal tissues, one of the following sites:
Abdominal serosa (peritoneum)
Cul de sac
Sigmoid colon
Small intestine
Other abdominal tissues
T3a NA D D
688 Infiltration of abdominal tissues, one of the following sites:
Abdominal serosa (visceral or parietal peritoneum of abdomen)
Sigmoid colon
Small intestine
Other abdominal structures
T3a NA D D
690 FIGO Stage IIIA T3a NA D D
692 OBSOLETE DATA REVIEWED V0203
See codes 665 and 693

Contiguous extension to abdominal tissues, more than one site:
Abdominal serosa (peritoneum)
Cul de sac
Sigmoid colon
Small intestine
Other abdominal tissues
T3b NA D D
693 Infiltration of abdominal tissues in code 688, more than one site T3b NA D D
694 FIGO Stage IIIB T3b NA D D
696 OBSOLETE DATA CONVERTED V0203
See code 699

FIGO Stage III [NOS]
ERROR: ERROR: ERROR: ERROR:
698 Abdominal tissues involvement, NOS T3NOS NA D D
699 FIGO Stage III [NOS] based on extension T3NOS NA D D
700 OBSOLETE DATA CONVERTED V0200
See code 710

Extension to bowel mucosa or
bladder mucosa (excluding bullous edema)
FIGO Stage IVA
FIGO Stage IV, NOS
ERROR: ERROR: ERROR: ERROR:
705 Invasion of:
Bladder wall
Bladder, NOS excluding mucosa
Rectal wall
Rectum, NOS excluding mucosa
T4 NA RE RE
708 705 + (688, 693, or 698)

Invasion of organs in code 705 plus infiltration of any abdominal tissues
T4 NA D D
710 OBSOLETE DATA REVIEWED AND CHANGED V0203
See codes 715, 720, and 730

Extension to bowel mucosa or
bladder (excluding bullous edema)

Note: On conversion of code 700 to 710, code 710 also included FIGO Stage IVA, FIGO Stage IV, NOS
ERROR: ERROR: ERROR: ERROR:
715 Extension to bowel mucosa or bladder (excluding bullous edema) T4 NA D D
720 FIGO Stage IVA T4 NA D D
730 FIGO Stage IV [NOS] based on extension T4 NA D D
800 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 665, 688, 693, and 850

Further contiguous extension
Abdominal serosa (peritoneum)
Cul de sac
Sigmoid colon
Small intestine
(See code 685 and 693 if number of involved sites is reported)
T3NOS NA D D
850 Further contiguous extension T3NOS NA D D
950 No evidence of primary tumor T0 NA U U
999 Unknown; extension not stated
Primary tumor cannot be assessed
Not documented in patient record
TX NA U U
- For CS Extension codes 100-110, 115-120, 125-130, 135-140, and 160-400 ONLY. The SS77 and SS2000 stages are assigned based on the value of CS Extension and peritoneal cytology status coded in CS-Site Specific Factor 2 as shown in the extra table Extension Cytology Summary Stage Table.