{
  "url": "https://dantelabs.com/traits/basilar-impression",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "basilar-impression",
    "id": "HP:0005758",
    "name": "Basilar impression",
    "definition": "Abnormal elevation of the floor of the posterior fossa including occipital condyles and foramen magnum.",
    "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-posterior-cranial-fossa-morphology",
        "name": "Abnormal posterior cranial fossa morphology",
        "url": "https://dantelabs.com/traits/abnormal-posterior-cranial-fossa-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "notch2",
        "symbol": "NOTCH2",
        "hgnc": "HGNC:7882",
        "name": "notch receptor 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/notch2"
      },
      {
        "slug": "dkk1",
        "symbol": "DKK1",
        "hgnc": "HGNC:2891",
        "name": "dickkopf Wnt signaling pathway inhibitor 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dkk1"
      },
      {
        "slug": "col1a1",
        "symbol": "COL1A1",
        "hgnc": "HGNC:2197",
        "name": "collagen type I alpha 1 chain",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col1a1"
      },
      {
        "slug": "col1a2",
        "symbol": "COL1A2",
        "hgnc": "HGNC:2198",
        "name": "collagen type I alpha 2 chain",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col1a2"
      },
      {
        "slug": "zbtb20",
        "symbol": "ZBTB20",
        "hgnc": "HGNC:13503",
        "name": "zinc finger and BTB domain containing 20",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/zbtb20"
      }
    ]
  }
}