{
  "url": "https://dantelabs.com/traits/broad-long-bones",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "broad-long-bones",
    "id": "HP:0005622",
    "name": "Broad long bones",
    "definition": "Increased cross-section (diameter) of the long bones. Note that widening may primarily affect specific regions of long bones (e.g., diaphysis or metaphysis), but this should be coded separately.",
    "synonyms": [
      "Wide long bones",
      "Widened long bones"
    ],
    "systems": [
      {
        "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-long-bone-morphology",
        "name": "Abnormal shape of long bone",
        "url": "https://dantelabs.com/traits/abnormal-long-bone-morphology"
      }
    ],
    "narrower": [
      {
        "slug": "broad-phalanx",
        "name": "Wide digital bones",
        "genes": 10,
        "url": "https://dantelabs.com/traits/broad-phalanx"
      },
      {
        "slug": "increased-fibular-diameter",
        "name": "Wide calf bone",
        "genes": 3,
        "url": "https://dantelabs.com/traits/increased-fibular-diameter"
      },
      {
        "slug": "broad-ulna",
        "name": "Broad ulna",
        "genes": 1,
        "url": "https://dantelabs.com/traits/broad-ulna"
      }
    ],
    "genes": [
      {
        "slug": "ddr2",
        "symbol": "DDR2",
        "hgnc": "HGNC:2731",
        "name": "discoidin domain receptor tyrosine kinase 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ddr2"
      },
      {
        "slug": "hhat",
        "symbol": "HHAT",
        "hgnc": "HGNC:18270",
        "name": "hedgehog acyltransferase",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hhat"
      },
      {
        "slug": "hspg2",
        "symbol": "HSPG2",
        "hgnc": "HGNC:5273",
        "name": "heparan sulfate proteoglycan 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hspg2"
      },
      {
        "slug": "bgn",
        "symbol": "BGN",
        "hgnc": "HGNC:1044",
        "name": "biglycan",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bgn"
      },
      {
        "slug": "col11a1",
        "symbol": "COL11A1",
        "hgnc": "HGNC:2186",
        "name": "collagen type XI alpha 1 chain",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col11a1"
      },
      {
        "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": "col2a1",
        "symbol": "COL2A1",
        "hgnc": "HGNC:2200",
        "name": "collagen type II alpha 1 chain",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col2a1"
      },
      {
        "slug": "gja1",
        "symbol": "GJA1",
        "hgnc": "HGNC:4274",
        "name": "gap junction protein alpha 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gja1"
      }
    ]
  }
}