CS Extension
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**: Ignore intraluminal extension to adjacent segment(s) of esophagus or to cardia of stomach, and code depth of invasion or extra-esophageal spread as indicated. **Note 3**: The assignment of T categories for gastrointestinal stromal tumors (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.| Code | Description | AJCC 7 T | AJCC 6 T | Summary Stage 1977 T | Summary Stage 2000 T |
|---|---|---|---|---|---|
| 000 | In situ, intrapethelial, noninvasive | TX | NA | IS | IS |
| 100 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invasive tumor confined to mucosa, NOS (includes intramucosal, NOS) |
Extension Size AJCC7 | NA | L | L |
| 110 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invades lamina propria |
Extension Size AJCC7 | NA | L | L |
| 120 | OBSOLETE DATA RETAINED AND REVIEWED V0203 See codes 155 and 165 Invades muscularis mucosae |
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 Invades submucosa |
Extension Size AJCC7 | NA | L | L |
| 165 | Tumor invades through submucosa and muscularis mucosae to involvew 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 | Localized, NOS | Extension Size AJCC7 | NA | L | L |
| 400 | Adventitia and/or soft tissue invaded Esophagus described as fixed |
Extension Size AJCC7 | NA | RE | RE |
| 450 | OBSOLETE DATA CONVERTED V0203 See code 250 Stated as T3, NOS |
ERROR: | ERROR: | ERROR: | ERROR: |
| 560 | Invasion into adventitia with invasion of/through mucosa | Extension Size AJCC7 | NA | RE | RE |
| 600 | OBSOLETE DATA RETAINED V0200 See codes 610 and 730 Tumor invades adjacent structures Cervical esophagus: Blood vessel(s): Carotid artery Jugular vein Subclavian artery Thyroid gland Intrathoracic, upper or mid-portion, esophagus: Blood vessel(s), major: Aorta Azygos vein Pulmonary artery/vein Vena cava Carina Diaphragm Main stem bronchus Trachea Intrathoracic, lower portion (abdominal), esophagus: Blood vessel(s): Aorta Gastric artery/vein Vena cava Diaphragm, not fixed, or NOS Stomach, cardia (via serosa) |
ERROR: | NA | RE | RE |
| 610 | Tumor invades adjacent structures: For cervical esophagus: Hypopharynx Jugular vein Larynx Thyroid gland For intrathoracic, upper or mid-portion, esophagus: Blood vessel(s), major: Azygos vein Diaphragm For intrathoracic, lower portion (abdominal), esophagus: Blood vessel(s), major: Gastric artery/vein Diaphragm, not fixed;diaphragm, NOS Stomach, cardia (via serosa) For intrathoracic esophagus, NOS: Pleura |
Extension Size AJCC7 | NA | RE | RE |
| 650 | OBSOLETE DATA RETAINED V0200 See codes 610, 680, and 730 Cervical esophagus: Carina Cervical vertebra(e) Hypopharynx Larynx Trachea Intrathoracic esophagus: Lung via bronchus Mediastinal structure(s), NOS Pleura Rib(s) Thoracic vertebra(e) |
ERROR: | NA | RE | RE |
| 660 | For thoracic/middle esophagus: Pericardium |
Extension Size AJCC7 | NA | RE | D |
| 680 | For cervical/upper esophagus: Pleura For abdominal/lower esophagus: Diaphragm fixed |
Extension Size AJCC7 | NA | D | D |
| 700 | OBSOLETE DATA CONVERTED V0203 See code 270 Stated as T4 [NOS] |
ERROR: | ERROR: | ERROR: | ERROR: |
| 730 | Tumor invades adjacent structures: For cervical esophagus: Blood vessel(s), major: Carotid artery Subclavian artery Carina Cervical vertebra(e) Trachea For intrathoracic, upper or mid-portion, esophagus: Blood vessel(s), major: Aorta Pulmonary artery/vein Vena cava Carina Main stem bronchus Trachea For intrathoracic, lower portion (abdominal), esophagus: Blood vessel(s), major: Aorta Vena cava For intrathoracic esophagus, NOS: Adjacent Rib(s) Lung via bronchus Mediastinal structure(s), NOS Thoracic vertebra(e) |
Extension Size AJCC7 | NA | RE | RE |
| 740 | 730 + 660 Any structure in code 730 involving thoracic/middle esophagus plus pericardium |
Extension Size AJCC7 | NA | RE | D |
| 745 | 730 + 680 Any structure in code 730 involving cervical/upper esophagus plus pleura OR Any structure in code 730 involving abdominal /lower esophagus plus fixation of diaphragm |
Extension Size AJCC7 | NA | D | D |
| 750 | For cervical/upper esophagus: Lung Main stem bronchus |
Extension Size AJCC7 | NA | D | D |
| 780 | OBSOLETE DATA RETAINED V0200 See code 660 Thoracic/middle esophagus: Pericardium |
ERROR: | NA | RE | D |
| 800 | OBSOLETE DATA RETAINED V0200 See codes 680 and 750 Further contiguous extension: Cervical/upper esophagus: Lung Main stem bronchus Pleura Abdominal/lower esophagus: Diaphragm fixed |
ERROR: | NA | D | D |
| 810 | Further contiguous extension | Extension Size AJCC7 | NA | D | D |
| 950 | No evidence of primary tumor | T0 | NA | U | U |
| 999 | Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record |
TX | NA | U | U |