CS Extension

Notes

**Note 1**: "Multiple (satellite) nodules/tumors" include satellitosis, multifocal tumors, and intrahepatic metastases. **Note 2**: Major vascular invasion is defined as invasion of the branches of the main portal vein (right or left portal vein, not including sectoral or segmental branches) or as invasion of one or more of the three hepatic veins (right, middle, or left). Invasion of the hepatic artery or vena cava is coded to 660. **Note 3**: Extension to gallbladder is not considered in AJCC staging for intrahepatic bile ducts but does affect Summary Stage. Use appropriate combination codes when gallbladder is involved. **Note 4**: All tumors with a periductal infiltrating growth pattern, a diffuse longitudinal growth pattern along the bile duct, are considered T4 by AJCC. For tumors with periductal infiltrating growth pattern, code the most specific information available about the extent of the tumor in CS Extension, and code periductal infiltrating growth pattern in CS Site-Specific Factor 10.
Code Description AJCC 7 T AJCC 6 T Summary Stage 1977 T Summary Stage 2000 T
000 In situ, intraepithelial, noninvasive
Tis TX IS IS
100 Single lesion in one lobe of liver
WITHOUT intrahepatic vascular invasion, including vascular invasion not stated
Extension Periductal Invasion AJCC7 T1 L L
120 Single lesion in more than one lobe of liver (contiguous growth)
WITHOUT vascular invasion, including vascular invasion not stated
Extension Periductal Invasion AJCC7 T1 RE RE
140 Extension to gallbladder, extent within liver not stated Extension Periductal Invasion AJCC7 T1 RE RE
160 140 + (100 or 120)

Extension to gallbladder plus single lesion in one or more lobes of liver (contiguous growth)
WITHOUT vascular invasion
Extension Periductal Invasion AJCC7 T1 RE RE
170 Stated as T1 with no other information on extension Extension Periductal Invasion AJCC7 T1 L L
200 Single lesion in one lobe of liver
WITH intrahepatic vascular invasion
Extension Periductal Invasion AJCC7 T2 L L
220 Single lesion in more than one lobe of liver (contiguous growth)
WITH vascular invasion
Extension Periductal Invasion AJCC7 T2 RE RE
240 (200 or 220) + 140

Single lesion in one or more lobes of liver (contiguous growth)
WITH vascular invasion plus extension to gallbladder
Extension Periductal Invasion AJCC7 T2 RE RE
250 Single tumor
WITH major vascular invasion: major branch(es) of portal or hepatic vein(s)
(See Note 2)
Extension Periductal Invasion AJCC7 T3 RE RE
260 250 + 140

Single tumor with major vascular invasion plus extension to gallbladder
Extension Periductal Invasion AJCC7 T3 RE RE
270 Stated as T2a with no other information on extension Extension Periductal Invasion AJCC7 T2 L L
300 Multiple (satellite) nodules/tumors in one lobe of liver
WITHOUT intrahepatic vascular invasion, including vascular invasion not stated
Extension Periductal Invasion AJCC7 Extension Size AJCC6 L L
400 Multiple (satellite) nodules/tumors in one lobe of liver(
WITH intrahepatic vascular invasion
Extension Periductal Invasion AJCC7 Extension Size AJCC6 L L
420 (300 or 400) + 140

Multiple (satellite) nodules/tumors in one lobe of liver
WITH or WITHOUT intrahepatic vascular invasion plus extension to gallbladder
Extension Periductal Invasion AJCC7 Extension Size AJCC6 RE RE
450 Multiple (satellite) nodules/tumor(s)
WITH major vascular invasion: major branch(es) of portal or hepatic vein(s)
(See Note 2)
Extension Periductal Invasion AJCC7 T3 RE RE
455 450 + 140

Multiple (satellite) nodules/tumor(s) with major vascular invasion plus extension to gallbladder
Extension Periductal Invasion AJCC7 T3 RE RE
460 Multiple (satellite) nodules/tumors in more than one lobe of liver
Satellite nodules, NOS
Extension Periductal Invasion AJCC7 Extension Size AJCC6 D RE
465 460 + 140

Multiple (satellite) nodules/tumors in more than one lobe of liver plus extension to gallbladder
Extension Periductal Invasion AJCC7 Extension Size AJCC6 D RE
470 (460 or 465) + any of (250, 260, 450, 455) Extension Periductal Invasion AJCC7 T3 D RE
475 Stated as T2b with no other information on extension Extension Periductal Invasion AJCC7 T2 L L
480 Stated as T2 [NOS] with no other information on extension Extension Periductal Invasion AJCC7 T2 L L
500 Confined to liver, NOS
Localized, NOS
Extension Periductal Invasion AJCC7 T1 L L
510 OBSOLETE DATA RETAINED AND REVIEWED V0203
See code 120 and 160

More than one lobe involved by contiguous growth (single lesion)
WITHOUT vascular invasion, including vascular invasion not stated
Extension Periductal Invasion AJCC7 T1 RE RE
520 OBSOLETE DATA RETAINED AND REVIEWED V0203
See code 220 and 240

More than one lobe involved by contiguous growth (single lesion)
WITH vascular invasion
Extension Periductal Invasion AJCC7 T2 RE RE
530 OBSOLETE DATA CONVERTED V0203
See code 140

Extension to gallbladder, extent within liver not stated
ERROR: ERROR: ERROR: ERROR:
540 OBSOLETE DATA CONVERTED V0203
See code 160

Extension to gallbladder 530 + (100 or 510)
ERROR: ERROR: ERROR: ERROR:
545 OBSOLETE DATA CONVERTED V0203
See code 170

Stated as T1 [NOS]
ERROR: ERROR: ERROR: ERROR:
550 OBSOLETE DATA CONVERTED V0203
See code 240

Extension to gallbladder 530 + (200 or 520)
ERROR: ERROR: ERROR: ERROR:
560 OBSOLETE DATA CONVERTED V0203
See code 420

Extension to gallbladder 530 + (300 or 400)
ERROR: ERROR: ERROR: ERROR:
570 OBSOLETE DATA CONVERTED V0203
See code 480

Stated as T2 [NOS] with no other information on extension
ERROR: ERROR: ERROR: ERROR:
580 Extrahepatic bile ducts Extension Periductal Invasion AJCC7 T4 RE RE
590 OBSOLETE DATA CONVERTED V0203
See code 270

Stated as T2a with no other information on extension
ERROR: ERROR: ERROR: ERROR:
620 580 + (460 or 465)

Extrahepatic bile ducts plus satellite nodules in more than one lobe or multiple tumors with major vascular invasion
Extension Periductal Invasion AJCC7 T4 D RE
630 OBSOLETE DATA RETAINED V0200
See codes 631 and 632

Major vascular invasion: major branch(es) of portal or hepatic vein(s) (see Note 2)
ERROR: T3 RE RE
631 OBSOLETE DATA REVIEWED V0203
See codes 250 and 260

Single tumor with major vascular invasion: major branch(es) of portal or hepatic vein(s) (see Note 2)
Extension Periductal Invasion AJCC7 T3 RE RE
632 OBSOLETE DATA REVIEWED V0203
See codes 450, 455, and 470

Multiple tumor(s) with major vascular invasion: major branch(es) of portal or hepatic vein(s) (see Note 2)
Extension Periductal Invasion AJCC7 T3 RE RE
640 Direct extension/perforation of visceral peritoneum Extension Periductal Invasion AJCC7 T4 RE RE
643 640 + (460, 465, 470) Extension Periductal Invasion AJCC7 T4 D D
645 Multiple (satellite) nodules on surface of liver parenchyma Extension Periductal Invasion AJCC7 T4 D D
650 OBSOLETE DATA RETAINED AND REVIEWED V0203
See codes 460, 465, 470, 620, 643, and 645

Multiple (satellite) nodules/tumors in more than one lobe of liver or on surface of parenchyma
Satellite nodules, NOS
Extension Periductal Invasion AJCC7 Extension Size AJCC6 D RE
655 OBSOLETE DATA CONVERTED V0203
See code 475

Stated as T2b with no other information on extension
ERROR: ERROR: ERROR: ERROR:
660 Extension to hepatic artery or vena cava Extension Periductal Invasion AJCC7 T4 RE RE
665 660 + (460, 465, 470) Extension Periductal Invasion AJCC7 T4 D RE
670 OBSOLETE DATA RETAINED V0200
See code 675

650 + 630
ERROR: T3 D RE
675 OBSOLETE DATA REVIEWED V0203
See codes 470, 643, and 665

650 + (631 or 632)
Extension Periductal Invasion AJCC7 T3 D RE
700 Diaphragm Extension Periductal Invasion AJCC7 T4 RE RE
750 OBSOLETE DATA RETAINED AND REVIEWED V0204
Perforation of visceral peritoneum included in 2 codes in CSv2: V0201, V0202. Any cases coded 750 for perforation of visceral peritoneum in V0201, V0202 should be recoded to 640. See codes 640, 755. The V0201, V0202 definition for code 750 is restored here. Code 750 did not include perforation of visceral peritoneum in V0203. Any cases coded 750 in V0203 should be recoded to 755.

Lesser omentum
Ligament(s):
Coronary
Falciform
Hepatoduodenal
Hepatogastric
Round (of liver)
Triangular
Perforation of visceral peritoneum
Parietal peritoneum
Extension Periductal Invasion AJCC7 T4 RE RE
755 Lesser omentum Ligament(s):
Coronary
Falciform
Hepatoduodenal
Hepatogastric
Round (of liver)
Triangular
Parietal peritoneum
Extension Periductal Invasion AJCC7 T4 RE RE
760 OBSOLETE DATA RETAINED V0200
See code 765

(650 or 670) + any of [(640) or (660) or (700) or (750)]
ERROR: T4 D RE
765 OBSOLETE DATA REVIEWED V0203
See codes 643, 665, 770

(650 or 675) + any of [(640) or (660) or (700) or (750)]
Extension Periductal Invasion AJCC7 T4 D RE
770 (700 or 750) + (460, 465, 470) Extension Periductal Invasion AJCC7 T4 D RE
780 Stated as T3 with no other information on extension Extension Periductal Invasion AJCC7 T3 RE RE
800 Further contiguous extension:
Pancreas
Pleura
Stomach
Other contiguous extension
Extension Periductal Invasion AJCC7 T4 D D
850 OBSOLETE DATA REVIEWED AND CHANGED V0203
See Note 4 and CS Site-Specific Factor 10 code 010

Tumor(s) with periductal invasion
Diffuse periductal infiltrating tumor
ERROR: ERROR: ERROR: ERROR:
855 Stated as T4 with no other information on extension T4 T1 L L
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
Extension Periductal Invasion AJCC7 TX U U
- For CS Extension codes 100-520, 580, 620, 631-650, 660-665, 675-755, 765-800, and 999 ONLY, the T category for AJCC 7 staging is assigned based on the value of CS Site-Specific Factor 10, as shown in the Extension Periductal Invasion AJCC 7 Table for this schema. - For CS Extension codes 300, 400, 420, 460, 465, 560, and 650 ONLY, the T category for AJCC 6 staging is assigned based on the value of CS Tumor Size, as shown in the Extension Size AJCC 6 Table for this schema.