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CID 637 Exogenous Substance Types (Current)
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## CID 637 Exogenous Substance Types

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Type:

  Extensible

Version:

  20151110

UID:

  1.2.840.10008.6.1.1102

Table CID 637. Exogenous Substance Types

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