CS Extension

Notes

**Note 1**: For rectosigmoid, ignore intraluminal extension to adjacent segment(s) of colon and rectum; code depth of invasion or extra-rectosigmoidal spread as indicated. **Note 2**: Codes 600 - 750 are used for contiguous extension from the site of origin. Discontinuous involvement is coded in CS Mets at DX. **Note 3**: Tumor that is adherent to other organs or structures, macroscopically, is classified cT4b; If tumor is present in adhesion(s) upon microscopic examination, the tumor is classified as pT4b. Use code 565 for macroscopic adhesions if no pathologic confirmation, and for pathologically confirmed tumor in adhesions. However, if no tumor is present in adhesion(s) upon microscopic examination, the classification is based upon extent of tumor invasion into or through the wall; use codes 000 - 163, 200, 210, 400, 415, 455, 458, 500, and 555 as appropriate to describe the microscopically confirmed depth of tumor invasion for these cases. Use codes 610-800 to code invasion of underlying structures from the adherent tumor. **Note 4**: High grade dysplasia and severe dysplasia are generally not reportable in cancer registries but, if a registry does collect these, codes 000 or 050 should be used.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive Tis Tis IS IS
050 (Adeno)carcinoma, noninvasive, in a polyp or adenoma Tis Tis IS IS
100 Invasive tumor confined to mucosa, NOS including intramucosal, NOS Tis Tis L L
110 Invades lamina propria, including lamina propria in the stalk of a polyp Tis Tis L L
120 Confined to and not through the muscularis mucosae, including muscularis mucosae in the stalk of a polyp. Tis Tis L L
130 Confined to head of polyp, NOS T1 T1 L L
140 Confined to stalk of polyp, NOS T1 T1 L L
150 Invasive tumor in polyp, NOS T1 T1 L L
160 Submucosa (superficial invasion), including submucosa in the head or stalk of a polyp T1 T1 L L
165 For rectum:
Tumor invading submucosa with intraluminal extension to colon and/or anal canal/anus
T1 T1 L L
170 Stated as T1 with no other information on extension T1 T1 L L
200 Muscularis propria invaded T2 T2 L L
210 For rectum:
Tumor invading muscularis propria with intraluminal extension to colon and/or anal canal/anus
T2 T2 RE L
250 Stated as T2 with no other information on extension T2 T2 L L
300 Confined to rectosigmoid junction, NOS
Confined to rectum, NOS
Localized, NOS
T1 T1 L L
400 Extension through wall, NOS
Invasion through muscularis propria or muscularis, NOS
Non-peritonealized perirectal tissues invaded
Perimuscular tissue invaded
Subserosal tissue/(sub)serosal fat invaded
Transmural, NOS
T3 T3 L L
410 OBSOLETE DATA CONVERTED V0203
See code 470

Stated as T3 with no other information on extension
ERROR: ERROR: ERROR: ERROR:
415 For rectum:
Tumor invading through muscularis propria with intraluminal extension to colon and/or anal canal/anus
T3 T3 RE L
420 OBSOLETE DATA CONVERTED V0203
See code 458

Fat, NOS
ERROR: ERROR: ERROR: ERROR:
450 OBSOLETE DATA RETAINED AND REVIEWED V0203
Extension to anus from rectum recoded based on intraluminal versus extraluminal extension
See codes 165, 210, 415, 455, and 610

Adjacent (connective) tissue:
For all sites:
Perirectal fat
For rectosigmoid:
Mesentery (including mesenteric fat, mesocolon)
Pericolic fat
For rectum:
Extension to anus
Rectovaginal septum
T3 T3 RE RE
455 Adjacent (connective) tissue:
For all sites:
Perirectal fat
For rectosigmoid:
Mesentery (including mesenteric fat, mesocolon)
Pericolic fat
For rectum:
Rectovaginal septum
T3 T3 RE RE
458 Fat, NOS T3 T3 RE RE
460 OBSOLETE DATA RETAINED AND REVIEWED V0203
See Note 3, codes 565, 570

Adherent to other organs or structures but no tumor found in adhesion(s)
T3 T3 RE RE
470 Stated as T3 with no other information on extension T3 T3 RE RE
490 OBSOLETE DATA CONVERTED V0203
See code 900

Stated as T4[NOS] with no other information on extension
ERROR: ERROR: ERROR: ERROR:
500 Invasion of/through serosa (mesothelium) (visceral peritoneum)
Tumor penetrates visceral peritoneum
T4a T4 RE RE
550 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 555, 610

(500) with [(420) or (450)]
T4a T4 RE RE
555 500 + (165, 210, 415, 455 or 458) T4a T4 RE RE
560 Stated as T4a with no other information on extension T4a T4 RE RE
565 Adherent to other organs or structures clinically with no microscopic examination
Tumor found in adhesion(s) if microscopic examination performed
T4b T4 RE RE
570 Adherent to other organs or structures, NOS T4b T4 RE RE
600 OBSOLETE DATA CONVERTED V0203
See code 610

Rectosigmoid:
Cul de sac (rectouterine pouch)
Pelvic wall
Small intestine
Rectum:
Bladder for males only
Cul de sac (rectouterine pouch)
Ductus deferens
Pelvic wall
Prostate
Rectovesical fascia for male only
Seminal vesicle(s)
Skeletal muscle of pelvic floor
Vagina
ERROR: ERROR: ERROR: ERROR:
610 For rectosigmoid:
Cul de sac (rectouterine pouch)
Pelvic wall/pelvic plexuses
Small intestine
For rectum:
Anal canal/anus extraluminally
Bladder for males only
Cul de sac (rectouterine pouch)
Ductus deferens
Pelvic wall
Prostate
Rectovesical fascia for males only
Seminal vesicle(s)
Skeletal muscle of pelvic floor
Vagina
T4b T4 RE RE
700 For all sites:
Ovary(ies)
Uterus
For rectosigmoid:
Bladder
Colon via serosa
Fallopian tube(s)
Prostate
Skeletal muscles of pelvic floor
Ureter(s)
Vagina
For rectum:
Bladder for females only
Bone(s) of pelvis
Cervix
Perineum, perianal skin
Sacrum
Sacral plexus
Urethra
T4b T4 D D
800 Further contiguous extension T4b T4 D D
850 Stated as T4b with no other information on extension T4b T4 RE RE
900 Stated as T4 [NOS] with no other information on extension T4NOS T4 RE RE
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