{
  "url": "https://dantelabs.com/traits/delayed-patellar-ossification",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "delayed-patellar-ossification",
    "id": "HP:0006454",
    "name": "Delayed bone maturation of the knee cap",
    "label": "Delayed patellar ossification",
    "definition": "Formation of bone in the patella later than normal.",
    "synonyms": [
      "Delayed patellae ossification"
    ],
    "systems": [
      {
        "slug": "abnormality-of-limbs",
        "name": "Abnormality of limbs",
        "url": "https://dantelabs.com/traits/abnormality-of-limbs"
      },
      {
        "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-enchondral-ossification",
        "name": "Abnormal enchondral ossification",
        "url": "https://dantelabs.com/traits/abnormal-enchondral-ossification"
      },
      {
        "slug": "abnormal-patella-morphology",
        "name": "Abnormal kneecap",
        "url": "https://dantelabs.com/traits/abnormal-patella-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "col2a1",
        "symbol": "COL2A1",
        "hgnc": "HGNC:2200",
        "name": "collagen type II alpha 1 chain",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col2a1"
      },
      {
        "slug": "kif22",
        "symbol": "KIF22",
        "hgnc": "HGNC:6391",
        "name": "kinesin family member 22",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kif22"
      }
    ]
  }
}