NHS North West Genomics
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NHS North West Genomics - Local Development build (v2.2.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

ValueSet: iGene Variant Category

Official URL: https://fhir.nwgenomics.nhs.uk/ValueSet/IGeneVariantCategoryVS Version: 2.2.0
Draft as of 2026-09-20 Computable Name: IGeneVariantCategoryVS

iGene's five variant-type categories - see the IGeneVariantCategory CodeSystem.

References

Logical Definition (CLD)

 

Expansion

Expansion performed internally based on codesystem iGene Variant Category v2.2.0 (CodeSystem)

This value set contains 5 concepts

SystemCodeDisplay (en)DefinitionJSONXML
https://fhir.nwgenomics.nhs.uk/CodeSystem/IGeneVariantCategory  SEQVSequence VariantA small-scale change in the DNA sequence at a specific gene/transcript location - substitution, insertion, deletion or indel.
https://fhir.nwgenomics.nhs.uk/CodeSystem/IGeneVariantCategory  ICNVIntragenic Copy Number VariantA copy-number change (gain or loss) contained within a single gene, e.g. loss of one or more exons.
https://fhir.nwgenomics.nhs.uk/CodeSystem/IGeneVariantCategory  MCNVMultigenic Copy Number VariantA copy-number change spanning a larger region covering multiple genes or a chromosome band.
https://fhir.nwgenomics.nhs.uk/CodeSystem/IGeneVariantCategory  SVStructural VariantA large-scale rearrangement (translocation, inversion, complex event) that is not necessarily a simple copy-number gain or loss.
https://fhir.nwgenomics.nhs.uk/CodeSystem/IGeneVariantCategory  LOHLoss of HeterozygosityOne parental copy of a region is lost or indistinguishable from the other - modelled as a separate Molecular Consequence Observation, not on Variant itself (see MolecularConsequence.fsh).

Description of the above table(s).