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National Cancer Data Base - Data Dictionary PUF 2014

AJCC Clinical Stage Group

PUF Data Item Name: 
TNM_CLIN_STAGE_GROUP
NAACCR Item #: 
970
length: 
4
Allowable values: 
Alphanumeric, Uppercase
Description: 
Identifies the applicable stage group based on the T, N, and M elements as defined by the American Joint Committee on Cancer (AJCC).
Registry Coding Instructions: 

·         Refer to the current AJCC Cancer Staging Manual for coding rules.
 

Analytic Note: 

For cases diagnosed on or prior to December 31, 2003, this item was expected to be completed by an attending physician, though registry staff were frequently involved in the determination of the information coded in this item through the review of the full range of clinical and patient notes available to registry staff.  For cases diagnosed January 1, 2004, through December 31, 2007, the CoC required registries to copy the staging items from a standardized document found in the patient record, as recorded by the managing physician.  PUF users may notice an increase in the proportion of 99s as a consequence of the CoC restriction on the allowable range of registry coding of information beyond that documented by the managing physician.
 
The rules changed again with cases diagnosed in 2008.  Beginning with 2008 diagnoses, registrars were required to record clinical stage.  If it was not available from a physician, it was to be coded from information available in the patient record.
 
Cases are coded using the AJCC Cancer Staging Manual edition in use during the year in which the case was diagnosed.  Consult the appropriate edition of this manual for organ or site specific codes and their definitions.  See AJCC TNM Edition Number (NAACCR Item #1060).  Prior to implementation of the 5th edition of the manual, some "slippage" in version occurred, and edition numbers are not included in the PUF for those older cases. 

Codes on this list comprise all codes valid for any AJCC manual through the 7th edition and for any chapter.  Please consult the applicable manual and chapter for codes that are valid for specific site, histology and AJCC edition combinations. 
 
There is no standard mechanism to recode AJCC items from one edition to another.  Careful review of the individual definitions in the respective AJCC manuals is necessary before combining or comparing data across two or more AJCC editions.
 
 

Code

Definition

Code

Definition

0

cStage 0

2C

cStage IIC

0A

cStage 0A

3

cStage III

0IS

cStage 0is

3A

cStage IIIA

1

cStage I

3B

cStage IIIB

1A

cStage IA

3C

cStage IIIC

1A1

cStage IA1

3C1

cStage IIIC1

1A2

cStage IA2

3C2

cStage IIIC2

1B

cStage IB

4

cStage IV

1B1

cStage IB1

4A

cStage IVA

1B2

cStage IB2

4A1

cStage IVA1

1C

cStage IC

4A2

cStage IVA2

1S

cStage IS

4B

cStage 4B

2

cStage II

4C

cStage IVC

2A

cStage IIA

OC

Occult

2A1

cStage IIA1

88

Not applicable

2A2

cStage IIA2

99

Unknown

2B

cStage IIB