{
  "url": "https://dantelabs.com/traits/thyroid-hemiagenesis",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "thyroid-hemiagenesis",
    "id": "HP:0011780",
    "name": "Thyroid hemiagenesis",
    "definition": "Absence of a lobe of the thyroid gland related to a failure of its embryologic development.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-endocrine-system",
        "name": "Abnormality of the endocrine system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-endocrine-system"
      }
    ],
    "broader": [
      {
        "slug": "aplasia-hypoplasia-of-the-thyroid-gland",
        "name": "Aplasia/Hypoplasia of the thyroid gland",
        "url": "https://dantelabs.com/traits/aplasia-hypoplasia-of-the-thyroid-gland"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "nkx2-1",
        "symbol": "NKX2-1",
        "hgnc": "HGNC:11825",
        "name": "NK2 homeobox 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nkx2-1"
      }
    ]
  }
}