{
  "url": "https://dantelabs.com/traits/supernumerary-ribs",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "supernumerary-ribs",
    "id": "HP:0005815",
    "name": "Extra ribs",
    "label": "Supernumerary ribs",
    "definition": "The presence of more than 12 rib pairs.",
    "synonyms": [],
    "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-rib-morphology",
        "name": "Abnormality of the ribs",
        "url": "https://dantelabs.com/traits/abnormal-rib-morphology"
      },
      {
        "slug": "supernumerary-bones-of-the-axial-skeleton",
        "name": "Supernumerary bones of the axial skeleton",
        "url": "https://dantelabs.com/traits/supernumerary-bones-of-the-axial-skeleton"
      }
    ],
    "narrower": [
      {
        "slug": "cervical-ribs",
        "name": "Cervical ribs",
        "genes": 13,
        "url": "https://dantelabs.com/traits/cervical-ribs"
      }
    ],
    "genes": [
      {
        "slug": "kdm6b",
        "symbol": "KDM6B",
        "hgnc": "HGNC:29012",
        "name": "lysine demethylase 6B",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kdm6b"
      },
      {
        "slug": "tgfbr1",
        "symbol": "TGFBR1",
        "hgnc": "HGNC:11772",
        "name": "transforming growth factor beta receptor 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tgfbr1"
      },
      {
        "slug": "gdf11",
        "symbol": "GDF11",
        "hgnc": "HGNC:4216",
        "name": "growth differentiation factor 11",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gdf11"
      },
      {
        "slug": "actb",
        "symbol": "ACTB",
        "hgnc": "HGNC:132",
        "name": "actin beta",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/actb"
      },
      {
        "slug": "aff3",
        "symbol": "AFF3",
        "hgnc": "HGNC:6473",
        "name": "ALF transcription elongation factor 3",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/aff3"
      },
      {
        "slug": "ank1",
        "symbol": "ANK1",
        "hgnc": "HGNC:492",
        "name": "ankyrin 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ank1"
      },
      {
        "slug": "dot1l",
        "symbol": "DOT1L",
        "hgnc": "HGNC:24948",
        "name": "DOT1 like histone lysine methyltransferase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dot1l"
      },
      {
        "slug": "maf",
        "symbol": "MAF",
        "hgnc": "HGNC:6776",
        "name": "MAF bZIP transcription factor",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/maf"
      },
      {
        "slug": "mtx2",
        "symbol": "MTX2",
        "hgnc": "HGNC:7506",
        "name": "metaxin 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mtx2"
      },
      {
        "slug": "rps26",
        "symbol": "RPS26",
        "hgnc": "HGNC:10414",
        "name": "ribosomal protein S26",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rps26"
      },
      {
        "slug": "ski",
        "symbol": "SKI",
        "hgnc": "HGNC:10896",
        "name": "SKI proto-oncogene",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ski"
      },
      {
        "slug": "ikbkg",
        "symbol": "IKBKG",
        "hgnc": "HGNC:5961",
        "name": "inhibitor of nuclear factor kappa B kinase regulatory subunit gamma",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ikbkg"
      },
      {
        "slug": "nipbl",
        "symbol": "NIPBL",
        "hgnc": "HGNC:28862",
        "name": "NIPBL cohesin loading factor",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nipbl"
      },
      {
        "slug": "pax3",
        "symbol": "PAX3",
        "hgnc": "HGNC:8617",
        "name": "paired box 3",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/pax3"
      },
      {
        "slug": "ptch1",
        "symbol": "PTCH1",
        "hgnc": "HGNC:9585",
        "name": "patched 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ptch1"
      },
      {
        "slug": "six6",
        "symbol": "SIX6",
        "hgnc": "HGNC:10892",
        "name": "SIX homeobox 6",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/six6"
      },
      {
        "slug": "sox2",
        "symbol": "SOX2",
        "hgnc": "HGNC:11195",
        "name": "SRY-box transcription factor 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sox2"
      },
      {
        "slug": "tbx6",
        "symbol": "TBX6",
        "hgnc": "HGNC:11605",
        "name": "T-box transcription factor 6",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tbx6"
      }
    ]
  }
}