* indicates required field
Length: 3
Source of Standard: AJCC
Section Name: Stage/Prognostic Factors
Year Implemented: 2003
Version Implemented: 10
Record Types: A, M, C, I
XML NAACCR ID: csExtension
Parent XML Element: Tumor
Required Status:
NPCR Collect: RH* - Historically collected and currently transmitted when available
CoC Collect: RH - Historically collected and currently transmitted
SEER Collect: RH* - Historically collected and currently transmitted when available
CCCR Collect: RH* - Historically collected and currently transmitted when available
Description:
Identifies contiguous growth (extension) of the primary tumor within the organ of origin or its direct extension into neighboring organs. For certain sites such as ovary, discontinuous metastasis is coded in CS Extension.
Rationale:
Tumor extension at diagnosis is a prognostic indicator used by Collaborative Staging to derive some TNM-T codes and some SEER Summary Stage codes.
Format:
Right justified, zero filled
Item Data Type:
digits
Allowable Values
000-999 (site-specific)
Codes:
See the most current version of the Collaborative Stage Data Collection System (http://cancerstaging.org),^13^ for rules and site-specific codes and coding structures.
Code Notes:
Note: For cases diagnosed prior to 2010, this was a 2 character field in CS version 1 which was converted to a 3 character field in CS version 2. Most 2 character codes were converted by adding a zero as the third character. For example, code 05 was usually converted to 050, 10 to 100, 11 to 110, etc. Special codes such as 88 and 99 were usually converted to 888 and 999, respectively.