API:  http://id.who.int/icd/release/10/2019/C30
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/C30",
    "parent": [
        "http://id.who.int/icd/release/10/2019/C30-C39"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/C30.0",
        "http://id.who.int/icd/release/10/2019/C30.1"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/C30",
    "code": "C30",
    "title": {
        "@language": "en",
        "@value": "Malignant neoplasm of nasal cavity and middle ear"
    },
    "classKind": "category"
}
Title: Malignant neoplasm of nasal cavity and middle ear
Code:  C30

Child

1.  http://id.who.int/icd/release/10/2019/C30.0
2.  http://id.who.int/icd/release/10/2019/C30.1