{
  "url": "https://dantelabs.com/traits/aplastic-zygomatic-arch",
  "trait": {
    "bundleId": "2026.10.16-c6eea6bf",
    "release": "2026-09-01",
    "slug": "aplastic-zygomatic-arch",
    "id": "HP:0034260",
    "name": "Aplastic zygomatic arch",
    "definition": "Developmental defect characterized by the absence of the zygomatic arch.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-head-or-neck",
        "name": "Abnormality of head or neck",
        "url": "https://dantelabs.com/traits/abnormality-of-head-or-neck"
      },
      {
        "slug": "abnormality-of-the-musculoskeletal-system",
        "name": "Abnormality of the musculoskeletal system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-musculoskeletal-system"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-zygomatic-arch-morphology",
        "name": "Abnormal zygomatic arch morphology",
        "url": "https://dantelabs.com/traits/abnormal-zygomatic-arch-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "polr1a",
        "symbol": "POLR1A",
        "hgnc": "HGNC:17264",
        "name": "RNA polymerase I subunit A",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/polr1a"
      },
      {
        "slug": "twist2",
        "symbol": "TWIST2",
        "hgnc": "HGNC:20670",
        "name": "twist family bHLH transcription factor 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/twist2"
      }
    ]
  }
}