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CID 637 Exogenous Substance Types
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## CID 637 Exogenous Substance Types

Type:

  Extensible

Version:

  20151110

Table CID 637. Exogenous Substance Types

Coding Scheme Designator | Code Value | Code Meaning | SNOMED-CT Concept ID | UMLS Concept Unique ID
--- | --- | --- | --- | ---
SRT | G-C1F9 | Graft material | 246345001 | C0181074
DCM | 127460 | Tumor Graft |  |
SRT | T-1A080 | Fibril | 88921000 | C0225328
SRT | L-30000 | Virus | 49872002 | C0042776
SRT | F-CB250 | Cytokine | 75777003 | C0079189
SRT | C-00224 | Toxin | 80917008 | C0040549

### Note

The specific concept (C22490, NCIt, "Tumor Cell Graft") (UMLS:C1519674) is not used, since grafts may not be cell suspensions, but rather entire tumors, fragments of tumor tissue, etc. Whether the graft is a xenograft or homograft is not specified, and may be encoded elsewhere (e.g., by encoding the species of origin). The non-tumor specific concept (G-C1F9, SRT, "Graft material") may be used when the graft is not a tumor (though strictly speaking, it is a SNOMED attribute rather than substance; UMLS:C0181074 does not make such a distinction).

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