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National Cancer Data Base - Data Dictionary PUF 2014

AJCC Pathologic Stage Group

PUF Data Item Name: 
TNM_PATH_STAGE_GROUP
NAACCR Item #: 
910
length: 
4
Allowable values: 
Alphanumeric, Uppercase
Description: 
Identifies the pathologically-determiend anatomic extent of disease based on the T, N, and M elements as defined by the American Joint Committee on Cancer (AJCC).
Registry Coding Instructions: 

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

Analytic Note: 

For cases diagnosed 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 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 elements from a standardized document, as recorded by the managing physician. 
 
Beginning with 2008 diagnoses, the rules changed again.  Physicians were no longer required to stage, but cancer committees in CoC cancer programs were required to devise plans to ascertain that staging was used appropriately to make treatment decisions.  Registries were encouraged to record physician staging when it was available, but were not required to do so.  The CoC determined that the stage groups derived from the Collaborative Stage Data Collection System met the criteria expected of pathologic staging, in providing an AJCC "final stage".  PUF users are likely to see a decrease in the completeness of pathologic staging in the "AJCC' staging items in the years following 2008.
 
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 was allowed, such that some codes for cases diagnosed the year prior to implementation of a given edition and the year following its replacement may also have codes from the edition.
 

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

pStage 0

2C

pStage IIC

0A

pStage 0A

3

pStage III

0IS

pStage 0is

3A

pStage IIIA

1

pStage I

3B

pStage IIIB

1A

pStage IA

3C

pStage IIIC

1A1

pStage IA1

3C1

pStage IIIC1

1A2

pStage IA2

3C2

pStage IIIC2

1B

pStage IB

4

pStage IV

1B1

pStage IB1

4A

pStage IVA

1B2

pStage IB2

4A1

pStage IVA1

1C

pStage IC

4A2

pStage IVA2

1S

pStage IS

4B

pStage 4B

2

pStage II

4C

pStage IVC

2A

pStage IIA

OC

Occult

2A1

pStage IIA1

88

Not applicable

2A2

pStage IIA2

99

Unknown

2B

pStage IIB

Blank

No pathologic staging for this case (2008+ only)