CS Extension

Notes

**Note 1**: Tumors of the head of the pancreas arise to the right of the superior mesenteric-portal vein confluence. **Note 2**: Islets of Langerhans are distributed throughout the pancreas; an islet tumor is coded to the subsite of the pancreas in which the tumor arises if the information is available. **Note 3**: The assignment of T1 and T2 categories for tumors of the pancreas 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 150 and 200 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, intraepithelial, noninvasive
Pancreatic Intraepithelial Neoplasia III (PanInIII)
Tis Tis IS IS
100 Confined to pancreas Extension Size Extension Size L L
150 Stated as T1 with no other information on extension Extension Size Extension Size L L
200 Stated as T2 with no other information on extension Extension Size Extension Size L L
300 Localized, NOS Extension Size Extension Size L L
400 Extension to peripancreatic tissue, NOS
Fixation to adjacent structures, NOS
T3 T3 RE RE
420 OBSOLETE DATA CONVERTED V0203
See code 595

Stated as T3, NOS
ERROR: ERROR: ERROR: ERROR:
440 Ampulla of Vater
Duodenum
Extrahepatic bile duct(s)
T3 T3 RE RE
500 Adjacent stomach
Stomach, NOS
T3 T3 RE RE
540 Blood vessel(s) (major):
Gastroduodenal artery
Hepatic artery
Pancreaticoduodenal artery
Portal vein
Superior mesenteric vein
Transverse colon, including hepatic flexure
T3 T3 RE RE
550 Mesenteric fat
Mesentery
Mesocolon
Peritoneum
T3 T3 RE D
570 Gallbladder T3 T3 RE D
575 Omentum T3 T3 RE D
580 Body of stomach T3 T3 D RE
590 580 + (550 and/or 570)

Body of stomach plus any structures in 550 and/or 570
T3 T3 D D
593 580 + 575

Body of stomach plus omentum
T3 T3 RE D
595 Stated as T3 with no other information on extension T3 T3 RE RE
600 Tumor is inseparable from the superior mesenteric artery
Superior mesenteric artery
T4 T4 RE RE
610 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 575, 593, 640

Omentum
T4 T4 RE D
630 Liver (including porta hepatis) T4 T4 RE D
640 600 + 575

Superior mesenteric artery plus omentum
T4 T4 RE D
650 600 + (550 and/or 570)

Superior mesenteric artery plus any structure in code 550 and/or 570
T4 T4 RE D
660 600 + 580

Superior mesenteric artery plus body of stomach
T4 T4 D RE
670 (550, 570, 610, and/or 630) + 600 + 580

Any structure in codes 550, 570, 610, and/or 630 plus superior mesenteric artery plus body of stomach

OR

(550, 570, 610, and/or 630) + 580

Any structure in codes 550, 570, 670, and/or 630 plus body of stomach
T4 T4 D D
680 Tumor is inseparable from the celiac axis
Aorta
Celiac artery
T4 T4 D D
690 Colon (other than transverse colon including hepatic flexure)
Spleen
T4 T4 D D
780 Adrenal (suprarenal) gland
Ileum
Jejunum
Kidney
Retroperitoneum
Ureter
T4 T4 D D
790 OBSOLETE DATA CONVERTED V0203
See code 810

Stated as T4, NOS
ERROR: ERROR: ERROR: ERROR:
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
- For CS Extension codes 100, 150, 200, and 300 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this schema. - For CS Extension codes 100, 150, 200, and 300 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size Table for this schema.