Organization

Field Name

ID

Required

KCR

cTNM Stage Group (CStageGroup)

30980

yes

NAACCR

TNM Clin Stage Group

970

yes


Field Length: 4

This field identifies the anatomic extent of disease based on the T, N, and M elements known prior to the start of any therapy.  Code the clinical TNM stage grouping from the cTNM classification in items 30950-30970, using the AJCC Cancer Staging Manual.  Record '88' if the TNM staging system is not appropriate for this site/histology of cancer.

Note: For diagnoses prior to 2004, this field was used to calculate Best Stage Group. It becomes the value in Best Stage Group if the pTNM Stage Group is equal to '88' or '99', or if the pathologic descriptor indicates pre-surgical treatment was administered.  After 2004, the CS derived AJCC 6th edition stage group is the Best Stage Group.

Code

Definition

Code

Definition

0

Stage 0

2B

Stage IIB

0A

Stage 0A

2C

Stage IIC

0IS

Stage 0is

3

Stage III

1

Stage I

3A

Stage IIIA

1A

Stage IA

3B

Stage IIIB

1A1

Stage IA1

3C

Stage IIIC

1A2

Stage IA2

3C1

Stage IIIC1

1B

Stage IB

3C2

Stage IIIC2

1B1

Stage IB1

4

Stage IV

1B2

Stage IB2

4A

Stage IVA

1C

Stage IC

4A1

Stage IVA1

1S

Stage IS

4A2

Stage IVA2

2

Stage II

4B

Stage IVB

2A

Stage IIA

4C

Stage IVC

2A1

Stage IIA1

OC

Occult

2A2

Stage IIA2

88

Not applicable



99

Unknown