# Variant Overview

This section is only available for variant biomarkers.

### Common Information

<table data-header-hidden><thead><tr><th width="230">Field Name</th><th>Description</th></tr></thead><tbody><tr><td>Variant Type</td><td>Type of the variant (e.g., SNV, insertion, deletion, MNV, etc.)</td></tr><tr><td>Chromosome</td><td>Chromosome number, X, Y, or MT</td></tr><tr><td>Start</td><td>Start position.</td></tr><tr><td>Stop</td><td>Stop position.</td></tr><tr><td>Matched End Chromosome</td><td>Mate chromosome of a translocation.</td></tr><tr><td>Matched End Position</td><td>Mate position of a translocation.</td></tr><tr><td>Ref Allele</td><td>The reference allele.</td></tr><tr><td>Alt Allele</td><td>The alternate allele.</td></tr><tr><td>HGVSG</td><td>HGVSG nomenclature.</td></tr><tr><td>Selected Transcript HGVS</td><td>HGVSc and HGVSp (in both 3-letter and 1-letter form) change on the selected transcript.</td></tr><tr><td>ISCN</td><td>ISCN nomenclature.</td></tr><tr><td>Selected Transcript Exons</td><td>Exon impacted of the selected transcript.</td></tr><tr><td>Selected Transcript Consequences</td><td>Consequences of the variant on the selected transcript, in Sequence Ontology terms.</td></tr><tr><td>Selected Transcript Gene</td><td>Gene symbol of the selected transcript.</td></tr><tr><td>Exons</td><td>Exon number(s) and the total exons for the active transcript, as applicable. A comma-delimited list is used for multiple exons.</td></tr><tr><td>Cytogenetic Band</td><td>Cytoband of variant.</td></tr><tr><td>All Consequences</td><td>Consequences of the variant across all transcripts, in Sequence Ontology terms.</td></tr></tbody></table>

> **Note:** Additional details present in the INFO field of the variant from the VCF will also be displayed here.

### External Links

| **Field Name** | **Description**                                                                                                                                                                                                                                                                                                                 |
| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Database       | Database Description                                                                                                                                                                                                                                                                                                            |
| IGV            | Integrative Genomics Viewer (IGV) is an open-source genome browser and visualization tool used to observe biologically interesting patterns in genomic data sets, including sequence data, gene models, alignments, and data from DNA microarrays.                                                                              |
| LOVD           | The Leiden Open Variation Database (LOVD) is an open-source database focused on the combination between a gene and a genetic (heritable) disease.                                                                                                                                                                               |
| UCSC Browser   | An interactive database offering access to genome sequence data from various vertebrate and invertebrate species and major model organisms, integrated with a large collection of aligned annotations.                                                                                                                          |
| Ensembl        | A bioinformatics project organizing biological information around the sequences of large genomes. It is a comprehensive source of stable automatic annotation of individual genomes, and of the synteny and orthology relationships between them..                                                                              |
| gnomAD         | A database that aggregates and harmonizes both exome and genome sequencing data from a wide variety of large-scale sequencing projects.                                                                                                                                                                                         |
| COSMIC         | An online database of somatically acquired mutations found in human cancer. This link opens COSMIC in a new browser tab.                                                                                                                                                                                                        |
| Google Scholar | <p>Google Scholar provides a way to broadly search for scholarly literature. Search across many disciplines and sources, including:<br>• Articles<br>• Theses<br>• Books<br>• Abstracts<br>This information comes from academic publishers, professional societies, online repositories, universities, and other web sites.</p> |
| PubMed         | PubMed allows you to search for literature for the variant.                                                                                                                                                                                                                                                                     |
| LitVar         | LitVar allows you to search for literature for the variant. This is available for any variant with an RSID.                                                                                                                                                                                                                     |
| Mastermind     | Mastermind allows you to search for literature for the variant. This is available for any variant with an hgvsg annotation.                                                                                                                                                                                                     |
Field Name	Description
Variant Type	Type of the variant (e.g., SNV, insertion, deletion, MNV, etc.)
Chromosome	Chromosome number, X, Y, or MT
Start	Start position.
Stop	Stop position.
Matched End Chromosome	Mate chromosome of a translocation.
Matched End Position	Mate position of a translocation.
Ref Allele	The reference allele.
Alt Allele	The alternate allele.
HGVSG	HGVSG nomenclature.
Selected Transcript HGVS	HGVSc and HGVSp (in both 3-letter and 1-letter form) change on the selected transcript.
ISCN	ISCN nomenclature.
Selected Transcript Exons	Exon impacted of the selected transcript.
Selected Transcript Consequences	Consequences of the variant on the selected transcript, in Sequence Ontology terms.
Selected Transcript Gene	Gene symbol of the selected transcript.
Exons	Exon number(s) and the total exons for the active transcript, as applicable. A comma-delimited list is used for multiple exons.
Cytogenetic Band	Cytoband of variant.
All Consequences	Consequences of the variant across all transcripts, in Sequence Ontology terms.