# Case type and region of interest

Add new case page > Case info screen > Select case type

## Select case type

Select the case type in order to define the proper analysis of your case.

## Select **region of interest**

Users can utilize a custom region of interest (ROI) BED[^1] file to limit analysis results to variants within the designated regions. A ROI BED determines which genomic regions will be included in the variant analysis.

{% hint style="info" %}
BED files that define custom kits can be added in the Organization settings under [Kit management](https://help.connected.illumina.com/emedgene/emedgene-analyze-manual/settings/organization_settings_-330+/kit-management).
{% endhint %}

If no custom ROI BED is selected, the system uses the [default ROI BED file based on the case type](https://help.connected.illumina.com/emedgene/emedgene-analyze-manual/launching-analysis/creating_a_single_case/case-type-and-region-of-interest/genomic_regions_by_case_type).

You can select any region of interest, regardless of the case type.

When selecting a Custom BED as you region of interest, you must select a specific BED file that is already configured in your organization.

<figure><img src="https://1131024994-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGCW0DnLlE7QjoZPNmKIi%2Fuploads%2Fgit-blob-a7fbe1389eb8f091a1007b04fbd776f4ee07517c%2FCostum%20BED%20%20GIF.gif?alt=media" alt=""><figcaption></figcaption></figure>

[^1]: BED (Browser Extensible Data)—a text file format used to store genomic regions as coordinates and associated annotations