---
title: "Region read for the genome browser"
method: GET
path: "/sessions/{session_id}/browser/region"
tags: ["browser"]
---

# Region read for the genome browser

`GET /sessions/{session_id}/browser/region`

## Request

- Base URL: `https://api.helena.bio` (the document declares no server; this is the origin it was published from)
- URL: `https://api.helena.bio/sessions/{session_id}/browser/region`
- Auth: HTTP bearer

All session features (snvs, svs, genes, regions) overlapping [start, end] on chrom.

## Path parameters

- `session_id` string, uuid, required

## Query parameters

- `chrom` string, required: Chromosome (bare or chr-prefixed)
- `start` integer, required: Window start (bp)
- `end` integer, required: Window end (bp)

## Response `200`

Successful Response

- BrowserRegionResponse: The region read payload (frontend getBrowserRegion result).
  - `snvs` BrowserSnvOut[], required
    - `chrom` string, required
    - `pos` integer, required
    - `gene` string, nullable
    - `cls` string, nullable
    - `hgvs` string, nullable
    - `ref` string, nullable
    - `alt` string, nullable
    - `bayesdelNoaf` number, nullable
    - `bayesdelNoafPred` string, nullable
    - `spliceaiMax` number, nullable
    - `spliceaiPred` string, nullable
    - `phylop` number, nullable
    - `gerp` number, nullable
    - `alphamissense` number, nullable
    - `sift` number, nullable
    - `metasvm` number, nullable
    - `dann` number, nullable
    - `mpc` number, nullable
    - `af` number, nullable
    - `afGrpmax` number, nullable
    - `popmax` string, nullable
    - `hom` integer, nullable
    - `loeuf` number, nullable
    - `misZ` number, nullable
    - `pli` number, nullable
    - `clinvarSig` string, nullable
    - `reviewStars` integer, nullable
    - `clinvarId` string, nullable
    - `criteria` string, nullable
    - `confidence` number, nullable
    - `consequence` string, nullable
    - `impact` string, nullable
    - `hgvsCdna` string, nullable
    - `transcriptId` string, nullable
    - `transcriptRepresentations` object, nullable
    - `exonNumber` string, nullable
    - `domains` string, nullable
    - `pm1Source` string, nullable
    - `vcepApplied` boolean, nullable
    - `vcepPanel` string, nullable
    - `deNovo` boolean, nullable
    - `hiScore` integer, nullable
    - `tsScore` integer, nullable
  - `svs` BrowserSvOut[], required
    - `chrom` string, required
    - `start` integer, required
    - `end` integer, required
    - `svType` string, nullable
    - `cls` string, nullable
  - `genes` BrowserGeneOut[], required
    - `chrom` string, required
    - `symbol` string, required
    - `start` integer, required
    - `end` integer, required
    - `strand` string, nullable
    - `exons` integer[]
  - `regions` BrowserRegionOut[], required
    - `chrom` string, required
    - `start` integer, required
    - `end` integer, required
    - `axis` string, required
    - `iscaId` string, nullable
    - `score` integer, nullable
  - `pext` BrowserExonPextOut[]
    - `chrom` string, required
    - `gene` string, required
    - `exonStart` integer, required
    - `exonEnd` integer, required
    - `maxTissuePext` number, required
    - `meanPext` number, required
    - `brainCortexPext` number, nullable
    - `wholeBloodPext` number, nullable
    - `tier` string, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service.md) · [All operations](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service/llms.txt) · [OpenAPI document](https://skmtc.dev/helena/apis/helix-insight-variant-analysis-service/revisions/fe51fd20cdf1?raw)