CS Extension
This input is used for staging
Notes
**Note 1**: Ignore intraluminal extension to adjacent segment(s) of colon; code depth of invasion or extracolonic spread as indicated. **Note 2**: Mucinous tumors are identified by morphology codes 8480, 8481, and 8490. **Note 3**: One or more malignant satellite peritumoral nodules or tumor deposits (TD) in the periappendiceal adipose tissue of a primary carcinoma without histologic evidence of residual lymph node in the nodule may represent discontinuous spread, venous invasion with extravascular spread, or a totally replaced lymph node. Replaced nodes are counted as positive nodes and coded in CS Lymph Nodes. TD representing discontinuous spread or venous invasion are coded in CS Extension, code 450, and the number of TD representing discontinuous spread or venous invasion is coded in CS Site-Specific Factor 4. **Note 4**: 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 000-160, 200, 400, 450, 500-550 as appropriate to describe the microscopically confirmed depth of tumor invasion for these cases. Use codes 600-650, 665, 700-810 to code invasion of underlying structures from the adherent tumor. **Note 5**: Codes 600-650 and 700-750are used for contiguous extension from the site of origin. Except for intraperitoneal metastases limited to the right lower quadrant (RLQ) of the abdomen for mucinous tumors, discontinuous involvement is coded in CS Mets at DX. **Note 6**: High-grade dysplasia is not always collected by cancer registries but, if collected, it should be coded 000 or 050.Default
999NAACCR Item
NAACCR #2810| 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 | Invasive tumor confined to the 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 | Invades submucosa (superficial invasion), including submucosa in stalk of polyp | T1 | T1 | L | L |
| 170 | Stated as T1 with no other information on extension | T1 | T1 | L | L |
| 200 | Muscularis propria invaded Stated as T2 with no other information on extension |
T2 | T2 | L | L |
| 300 | Confined to appendix, NOS Localized, NOS |
T1 | T1 | L | L |
| 400 | Extension through wall, NOS Invasion through muscularis propria or muscularis, NOS Non-peritonealized pericolic tissues invaded Perimuscular tissue invaded Subserosal tissue/(sub)serosal fat invaded Transmural, NOS Wall, NOS |
T3 | T3 | L | L |
| 410 | OBSOLETE DATA CONVERTED V0203 See code 470 Stated as T3[NOS] with no other information on extension |
ERROR: | ERROR: | ERROR: | ERROR: |
| 420 | OBSOLETE DATA CONVERTED V0203 See code 458 Fat, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 450 | Extension to: Adjacent tissue(s), NOS Connective tissue Mesenteric fat Mesentery Mesoappendix Pericolic fat |
T3 | T3 | RE | RE |
| 458 | Fat, NOS | T3 | T3 | RE | RE |
| 460 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See Note 4, coded 565 and 570 Adherent to other organs or structures, but no microscopic tumor found in adhesion(s) |
T3 | T3 | RE | RE |
| 470 | Stated as T3 with no other information on extension | T3 | T3 | L | L |
| 500 | Invasion of/through serosa (mesothelium) (visceral peritoneum) Tumor penetrates to surface of visceral peritoneum |
T4a | T4 | RE | RE |
| 510 | For mucinous tumors only: Peritoneal involvement confined within right lower quadrant ONLY |
T4a | TX | D | D |
| 511 | 510 + any of (130-160 or 300) For mucinous tumors only: Peritoneal involvement confined within right lower quadrant plus local extension equivalent to T1 |
T4a | T1 | D | D |
| 512 | 510 + 200 For mucinous tumors only: Peritoneal involvement confined within right lower quadrant plus local extension equivalent to T2 |
T4a | T2 | D | D |
| 513 | 510 + (400, 450, 458) For mucinous tumors only: Peritoneal involvement confined within right lower quadrant plus regional extension equivalent to T3 |
T4a | T3 | D | D |
| 514 | 510 + 500 For mucinous tumors only: Peritoneal involvement confined within right lower quadrant plus regional extension equivalent to T4 |
T4a | T4 | D | D |
| 550 | 500 + (450, 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 | Greater omentum Small intestine |
T4b | T4 | RE | RE |
| 650 | Abdominal wall Retroperitoneum (excluding fat) |
T4b | T4 | RE | RE |
| 660 | OBSOLETE DATA RETAINED V0200 Ascending colon: Right kidney Right ureter Descending colon: Left kidney Left ureter |
ERROR: | T4 | RE | RE |
| 665 | Any of (550, 565 - 650) + any of (510 - 514) | T4b | T4 | D | D |
| 670 | OBSOLETE DATA CONVERTED V0203 See code 665 (570-650) + 510 |
ERROR: | ERROR: | ERROR: | ERROR: |
| 675 | OBSOLETE DATA CONVERTED V0203 See code 665 (570-650) + 511 |
ERROR: | ERROR: | ERROR: | ERROR: |
| 680 | OBSOLETE DATA CONVERTED V0203 See code 665 (570-650) + 512 |
ERROR: | ERROR: | ERROR: | ERROR: |
| 690 | OBSOLETE DATA CONVERTED V0203 See code 665 (570-650) + 513 |
ERROR: | ERROR: | ERROR: | ERROR: |
| 700 | Fallopian tube Ovary Uterus |
T4b | T4 | D | D |
| 750 | Adrenal (suprarenal) gland Bladder Diaphragm Fistula to skin Gallbladder Other segment(s) of colon/rectum via serosa |
T4b | T4 | D | D |
| 800 | Kidney Liver Ureter Other contiguous extension |
T4b | T4 | D | D |
| 810 | Any of (565-800) + 510 For mucinous tumors only: Regional extension characterized as T4b plus peritoneal involvement confined within right lower quadrant |
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 |