---
title: "All Subclasses Of A Concept - Q11 And Q12"
method: GET
path: "/terminologies/subclasses_of_concept"
tags: ["Terminologies"]
---

# All Subclasses Of A Concept - Q11 And Q12

`GET /terminologies/subclasses_of_concept`

## Request

- Base URL: `https://cadsrapi.cancer.gov/si-api/v1`
- URL: `https://cadsrapi.cancer.gov/si-api/v1/terminologies/subclasses_of_concept`
- Auth: none declared
- TypeScript: <https://skmtc.dev/cancer/apis/ssis-api/docs/terminologies/subclasses_of_concept/get.ts> (a function with typed inputs; its response is checked against the schema)

Get all subclasses of a concept by its identifier. This utilizes SRRO to find the appropriate property for a specified graph. Note that all subclasses should include its self.

## Query parameters

- `term_id` string, required
- `use_transitive_closure` string, required

## Response `200`

OK

- TerminologiessubclassesOfConceptGETResponse
  - `results` SubclassesOfConcept[], required
    - `subClass` string, required
    - `subClassLabel` string, required
    - `subClassId` string, required
  - `apiResponse` ApiResponse, required
    - `type` string, required: S Success, E Error, W Warning, I Info, A Abort
    - `message` string: Message text
    - `service` string: service that errorred
    - `time` string: Date and time of error
    - `ssnid` string: session id
    - `callStack` CallstackItem[]
      - `service` string, required
      - `flowStep` string, required

## Other responses

- `401`: Access Denied

---

[API](https://skmtc.dev/cancer/apis/ssis-api.md) - [All operations](https://skmtc.dev/cancer/apis/ssis-api/llms.txt) - [OpenAPI document](https://skmtc.dev/cancer/apis/ssis-api/revisions/1e6df122366f?raw)