CS Extension
This input is used for staging
Notes
**Note 1**: AJCC does not include a Tis category for gastrointestinal stromal tumors (GIST). Any case with a CS Extension code of 000 is mapped to TX for AJCC 7 stage and in situ Summary Stage. **Note 2**: Give priority to coding depth of invasion or spread outside the small intestine for tumor with intraluminal or lateral extension to adjacent segment(s) of small intestine. **Note 3**: The assignment of T categories for GISTs is based on tumor size. A physician's statement of the T category may be used to code CS Tumor Size and/or CS Extension if this is the only information in the medical record regarding one or both of these fields. However the two fields are coded independently: for example the record may document size but not extension, other than the physician's statement of the T category. Use codes 170, 210, 250, and 270 as appropriate to code CS Extension based on a statement of T when no other extension information is available. **Note 4**: Use code 150 only if GIST is described as arising in a polyp. Do not use this code for GIST described as arising in the wall of the appendix and extending into the lumen with a polypoid appearance. **Note 5**: Use code 300 for localized cases only if no information is available to assign a more specific code.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 | TX | NA | IS | IS |
| 050 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See code 000 (Adeno)carcinoma in a polyp, noninvasive |
TX | NA | IS | IS |
| 100 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invasive tumor confined to mucosa, NOS, including intramucosal, NOS |
Extension Size AJCC7 | NA | L | L |
| 110 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invasion of lamina propria |
Extension Size AJCC7 | NA | L | L |
| 120 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See code 155 and 165 Invasion of muscularis mucosae |
Extension Size AJCC7 | NA | L | L |
| 130 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Confined to head of polyp |
Extension Size AJCC7 | NA | L | L |
| 140 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Confined to stalk of polyp |
Extension Size AJCC7 | NA | L | L |
| 150 | Invasion of polyp, NOS | Extension Size AJCC7 | NA | L | L |
| 155 | Tumor confined to muscular wall | Extension Size AJCC7 | NA | L | L |
| 160 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invasion of submucosa (superficial invasion) |
Extension Size AJCC7 | NA | L | L |
| 165 | Tumor invades through submucosa and muscularis mucosae to involve mucosa | Extension Size AJCC7 | NA | L | L |
| 170 | Stated as T1 with no other information on extension | Extension Size AJCC7 | NA | L | L |
| 200 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See code 155 and 165 Muscularis propria invaded |
Extension Size AJCC7 | NA | L | L |
| 210 | Stated as T2 with no other information on extension | Extension Size AJCC7 | NA | L | L |
| 250 | Stated as T3 with no other information on extension | Extension Size AJCC7 | NA | L | L |
| 270 | Stated as T4 with no other information on extension | Extension Size AJCC7 | NA | L | L |
| 300 | Intraluminal spread to other segments of small intestine or cecum (See Note 2) Localized, NOS |
Extension Size AJCC7 | NA | L | L |
| 400 | Invasion through muscularis propria or muscularis, NOS Extension through wall, NOS Subserosal tissue/(sub) serosal fat invaded Transmural, NOS |
Extension Size AJCC7 | NA | L | L |
| 410 | OBSOLETE DATA CONVERTED V0203 See code 250 Stated as T3, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 420 | OBSOLETE DATA CONVERTED V0203 See code 458 Fat, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 450 | Adjacent connective tissue Mesentery, including mesenteric fat, invaded less than or equal to 2 cm in depth or invaded, NOS Nonperitonealized perimuscular tissue invaded less than or equal to 2 cm in depth or invaded, NOS Retroperitoneum invaded less than or equal to 2 cm in depth or NOS |
Extension Size AJCC7 | NA | RE | RE |
| 458 | Fat, NOS | Extension Size AJCC7 | NA | RE | RE |
| 500 | Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum) | Extension Size AJCC7 | NA | L | RE |
| 550 | 500 + (420 or 450) Invasion of/through serosa plus invasion of structures in codes 420 or 450 |
Extension Size AJCC7 | NA | RE | RE |
| 560 | Invasion of/through serosa with invasion of/through mucosa | Extension Size AJCC7 | NA | RE | RE |
| 600 | For duodenum primary only: Ampulla of Vater Diaphragm Extrahepatic bile duct(s) Gallbladder Pancreas Pancreatic duct |
Extension Size AJCC7 | NA | RE | RE |
| 650 | For duodenum primary only: Blood vessel(s), major: Aorta Gastroduodenal artery Portal vein Renal vein Superior mesenteric artery or vein Vena cava Greater omentum Hepatic flexure Kidney, NOS Kidney, right Liver, NOS Liver, quadrate lobe Liver, right lobe Omentum, NOS Transverse colon Ureter, right For jejunum or ileum primaries only: Colon, including appendix |
Extension Size AJCC7 | NA | RE | RE |
| 660 | For duodenum primary only: Stomach |
Extension Size AJCC7 | NA | RE | RE |
| 670 | Abdominal wall Mesentery invaded greater than 2 cm in depth Non-peritonealized perimuscular tissue invaded greater than 2 cm in depth Retroperitoneum invaded greater than 2 cm in depth |
Extension Size AJCC7 | NA | RE | RE |
| 680 | Other segments of the small intestine via serosa | Extension Size AJCC7 | NA | RE | RE |
| 690 | OBSOLETE DATA CONVERTED V0203 See code 270 Stated as T4, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 700 | For jejunum or ileum primary only: Bladder Fallopian tube(s) Ovary(ies) Uterus |
Extension Size AJCC7 | NA | D | D |
| 800 | Further contiguous extension | Extension Size AJCC7 | NA | D | D |
| 950 | No evidence of primary tumor | T0 | NA | U | U |
| 999 | Unknown extension Primary tumor cannot be assessed Not documented in patient record |
TX | NA | U | U |