NAACCR Item #400: Primary Site

Item # Length Source of Standard Year Implemented Version Implemented Year Retired Version Retired
400 4 SEER/CoC

NAACCR XML: Tumor.primarySite

Alternate Names
   IDC-O-2/3 Topography (CCCR)

Code for the primary site of the tumor being reported using either ICD-O-2 or ICD-O-3. NAACCR adopted ICD-O-2 as the standard coding system for tumors diagnosed beginning January 1, 1992. In addition, NAACCR recommended that tumors diagnosed prior to 1992 be converted to ICD-O-2. The topography (primary site) codes did not change between ICD-O-2 and ICD-O-3.

Note: See data item Site (73-91) ICD-O-1 [1960] for ICD-O-1 cases.