ICD-O-3.1-NCIt Mapping Files

NCI Metathesaurus (NCIm) is the central EVS terminology cross-mapping database. EVS extracted these ICD-O-3.1 to NCIt mappings from NCIm, where they are maintained along with mappings between many other sources.

ICD-O-3.1-NCIt Morphology and ICD-O-3.1-NCIt Topography

This data is in the form of a tab delimited file with the following columns:

ICD-O Code: ICD-O-3.1 code
Level: ICD-O-3.1 level*
Term Type: NCI Metathesaurus term type
Term Type Desc: NCI Metathesaurus term type description
ICD-O string: ICD-O-3.1 string
NCIm CUI: NCI Metathesaurus Concept Unique Identifier
NCIt Code: NCI Thesaurus code mapping (if applicable)
NCIt PT string (Preferred term): Preferred term of NCI Thesaurus code

*ICD-O "Level" values correspond with NCIm term types and descriptions as follows:

Level	Term type	Term type desc
1 (Axis name)	HT	Hierarchical term
2	HT	Hierarchical term
3	HT	Hierarchical term
4	PT, OP	Preferred term/Obsolete preferred term Obsolete terms are indicated in original file
Related	RT, ORT	Related term/Obsolete related term Obsolete terms are indicated in original file
Synonym	SY, IS	Synonym/Inactive (obsolete) synonym Obsolete terms are indicated in original files