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 |