CS Extension
Notes
**Note 1**: For this schema, AJCC defines Tis as carcinoma in situ/dysplasia (tumor size less than 0.5mm), confined to mucosa. Neuroendocrine tumors (NET) stated to be in situ, noninvasive, or confined to mucosa are classified as Tis. "Dysplasia" alone is generally not reportable in cancer registries but, if a registry does collect it, code 000 should be used. **Note 2**: Intraluminal or intramural extension to esophagus and duodenum is classified by the depth of greatest invasion. For extension to esophagus or duodenum via serosa, see code 600. **Note 3**: The assignment of the T1 category for NETs of the stomach is based on tumor size. A physician's statement of the T category may be used to code both 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. Use codes 170, 390, 480, or 810 as appropriate to code CS Extension based on a statement of T when no other information is available. **Note 4**: Use code 300 for localized tumor only if no information is available to assign code 100, 110, 120, 160. 170, 200, 390, or 400.Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
---|---|---|---|---|---|
000 | In situ, intraepithelial, noninvasive Dysplasia Tumor size less than 0.5 millimeters (mm) |
Tis | Tis | IS | IS |
050 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See code 000 (Adeno)carcinoma in a polyp, noninvasive |
Tis | Tis | IS | IS |
100 | Tumor confined to mucosa, NOS including intramucosal, NOS | Tis | T1 | L | L |
110 | Invades lamina propria, including lamina propria in a polyp | Extension Size AJCC7 | T1 | L | L |
120 | Invades muscularis mucosae, including muscularis mucosae in a polyp | Extension Size AJCC7 | T1 | L | L |
130 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 110, 120, 160 Confined to head of polyp Extension to stalk |
Extension Size AJCC7 | T1 | L | L |
140 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 110, 120,160 Confined to stalk of polyp |
Extension Size AJCC7 | T1 | L | L |
150 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 110, 120, 160 Tumor in polyp, NOS |
Extension Size AJCC7 | T1 | L | L |
160 | Invades submucosa (superficial invasion), including submucosa in a polyp | Extension Size AJCC7 | T1 | L | L |
170 | Stated as T1 with no other information on extension | Extension Size AJCC7 | T1 | L | L |
200 | Invades into but not through muscularis propria | T2 | T2a | L | L |
300 | Localized, NOS Implants inside stomach |
Extension Size AJCC7 | T1 | L | L |
340 | OBSOLETE DATA CONVERTED V0203 See code 170 Stated as T1, NOS with no other information on extension |
ERROR: | ERROR: | ERROR: | ERROR: |
350 | OBSOLETE DATA RETAINED V0200 Linitis plastica (see Note 2) and no other information regarding extension is available. |
ERROR: | T2a | RE | L |
390 | Stated as T2 with no other information on extension | T2 | T2NOS | L | L |
400 | Invasion through muscularis propria or muscularis, NOS Extension through wall, NOS Perimuscular tissue invaded Subserosa /(sub)serosal fat penetrated |
T3 | T2b | L | L |
450 | Extension to adjacent (connective) tissue WITHOUT perforation of visceral peritoneum: Gastric artery Ligaments: Gastrocolic Gastrohepatic Gastrosplenic Omentum, NOS: Greater Lesser Perigastric fat |
T3 | T2b | RE | RE |
480 | Stated as T3 with no other information on extension | T3 | T3 | RE | RE |
490 | OBSOLETE DATA CONVERTED V0203 See code 810 Stated as T4, [NOS] with no other information on extension |
ERROR: | ERROR: | ERROR: | ERROR: |
500 | Invasion of/through serosa (mesothelium) (tunica serosa) (visceral peritoneum) Including perforation of visceral peritoneum covering the gastric ligaments or the omentum WITHOUT invasion of adjacent structures |
T4 | T3 | RE | RE |
550 | 500 + 450 Invasion of tissues in code 500 plus extension to structures in code 450 |
T4 | T3 | RE | RE |
600 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 610, 650 Diaphragm Duodenum via serosa or NOS Esophagus via serosa Ileum Jejunum Liver Pancreas Small intestine, NOS Spleen Transverse colon/mesocolon (including flexures) Celiac axis Aorta |
T4 | T4 | RE | RE |
610 | Diaphragm Duodenum via serosa or NOS Esophagus via serosa Ileum Jejunum Liver Pancreas Small intestine, NOS Spleen Transverse colon/mesocolon (including flexures) |
T4 | T4 | RE | RE |
650 | Aorta Celiac axis |
T4 | T4 | D | D |
700 | Abdominal wall Adrenal gland Kidney Retroperitoneum |
T4 | T4 | D | D |
800 | Further contiguous extension | T4 | T4 | D | D |
810 | Stated as T4 with no other information on extension | T4 | 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 |