{
  "url": "https://dantelabs.com/traits/pterygium",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "pterygium",
    "id": "HP:0001059",
    "name": "Pterygium",
    "definition": "Pterygia are 'winglike' triangular membranes occurring in the neck, eyes, knees, elbows, ankles or digits.",
    "synonyms": [
      "Pterygia"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-integument",
        "name": "Abnormality of the integument",
        "url": "https://dantelabs.com/traits/abnormality-of-the-integument"
      },
      {
        "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-joint-morphology",
        "name": "Abnormal shape of joints",
        "url": "https://dantelabs.com/traits/abnormal-joint-morphology"
      },
      {
        "slug": "regional-abnormality-of-skin",
        "name": "Regional abnormality of skin",
        "url": "https://dantelabs.com/traits/regional-abnormality-of-skin"
      }
    ],
    "narrower": [
      {
        "slug": "axillary-pterygium",
        "name": "Axillary pterygium",
        "genes": 13,
        "url": "https://dantelabs.com/traits/axillary-pterygium"
      },
      {
        "slug": "popliteal-pterygium",
        "name": "Popliteal pterygium",
        "genes": 8,
        "url": "https://dantelabs.com/traits/popliteal-pterygium"
      },
      {
        "slug": "antecubital-pterygium",
        "name": "Antecubital pterygium",
        "genes": 7,
        "url": "https://dantelabs.com/traits/antecubital-pterygium"
      },
      {
        "slug": "multiple-pterygia",
        "name": "Multiple pterygia",
        "genes": 4,
        "url": "https://dantelabs.com/traits/multiple-pterygia"
      },
      {
        "slug": "intercrural-pterygium",
        "name": "Intercrural pterygium",
        "genes": 2,
        "url": "https://dantelabs.com/traits/intercrural-pterygium"
      },
      {
        "slug": "neck-pterygia",
        "name": "Neck pterygia",
        "genes": 2,
        "url": "https://dantelabs.com/traits/neck-pterygia"
      }
    ],
    "genes": [
      {
        "slug": "chrng",
        "symbol": "CHRNG",
        "hgnc": "HGNC:1967",
        "name": "cholinergic receptor nicotinic gamma subunit",
        "frequency": "obligate",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/chrng"
      },
      {
        "slug": "flvcr1",
        "symbol": "FLVCR1",
        "hgnc": "HGNC:24682",
        "name": "FLVCR choline and heme transporter 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/flvcr1"
      },
      {
        "slug": "kcnk3",
        "symbol": "KCNK3",
        "hgnc": "HGNC:6278",
        "name": "potassium two pore domain channel subfamily K member 3",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kcnk3"
      },
      {
        "slug": "polr1a",
        "symbol": "POLR1A",
        "hgnc": "HGNC:17264",
        "name": "RNA polymerase I subunit A",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/polr1a"
      },
      {
        "slug": "ripk4",
        "symbol": "RIPK4",
        "hgnc": "HGNC:496",
        "name": "receptor interacting serine/threonine kinase 4",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ripk4"
      },
      {
        "slug": "fkbp10",
        "symbol": "FKBP10",
        "hgnc": "HGNC:18169",
        "name": "FKBP prolyl isomerase 10",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/fkbp10"
      },
      {
        "slug": "hspg2",
        "symbol": "HSPG2",
        "hgnc": "HGNC:5273",
        "name": "heparan sulfate proteoglycan 2",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/hspg2"
      },
      {
        "slug": "plod2",
        "symbol": "PLOD2",
        "hgnc": "HGNC:9082",
        "name": "procollagen-lysine,2-oxoglutarate 5-dioxygenase 2",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/plod2"
      },
      {
        "slug": "ddb2",
        "symbol": "DDB2",
        "hgnc": "HGNC:2718",
        "name": "damage specific DNA binding protein 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ddb2"
      },
      {
        "slug": "dok7",
        "symbol": "DOK7",
        "hgnc": "HGNC:26594",
        "name": "docking protein 7",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dok7"
      },
      {
        "slug": "ercc2",
        "symbol": "ERCC2",
        "hgnc": "HGNC:3434",
        "name": "ERCC excision repair 2, TFIIH core complex helicase subunit",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ercc2"
      },
      {
        "slug": "ercc3",
        "symbol": "ERCC3",
        "hgnc": "HGNC:3435",
        "name": "ERCC excision repair 3, TFIIH core complex helicase subunit",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ercc3"
      },
      {
        "slug": "ercc4",
        "symbol": "ERCC4",
        "hgnc": "HGNC:3436",
        "name": "ERCC excision repair 4, endonuclease catalytic subunit",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ercc4"
      },
      {
        "slug": "ercc5",
        "symbol": "ERCC5",
        "hgnc": "HGNC:3437",
        "name": "ERCC excision repair 5, endonuclease",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ercc5"
      },
      {
        "slug": "flvcr2",
        "symbol": "FLVCR2",
        "hgnc": "HGNC:20105",
        "name": "FLVCR choline and putative heme transporter 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/flvcr2"
      },
      {
        "slug": "gldn",
        "symbol": "GLDN",
        "hgnc": "HGNC:29514",
        "name": "gliomedin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gldn"
      },
      {
        "slug": "gpc6",
        "symbol": "GPC6",
        "hgnc": "HGNC:4454",
        "name": "glypican 6",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gpc6"
      },
      {
        "slug": "itga6",
        "symbol": "ITGA6",
        "hgnc": "HGNC:6142",
        "name": "integrin subunit alpha 6",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/itga6"
      },
      {
        "slug": "itgb4",
        "symbol": "ITGB4",
        "hgnc": "HGNC:6158",
        "name": "integrin subunit beta 4",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/itgb4"
      },
      {
        "slug": "kif21a",
        "symbol": "KIF21A",
        "hgnc": "HGNC:19349",
        "name": "kinesin family member 21A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kif21a"
      },
      {
        "slug": "magel2",
        "symbol": "MAGEL2",
        "hgnc": "HGNC:6814",
        "name": "MAGE family member L2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/magel2"
      },
      {
        "slug": "mmp14",
        "symbol": "MMP14",
        "hgnc": "HGNC:7160",
        "name": "matrix metallopeptidase 14",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mmp14"
      },
      {
        "slug": "mmp2",
        "symbol": "MMP2",
        "hgnc": "HGNC:7166",
        "name": "matrix metallopeptidase 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mmp2"
      },
      {
        "slug": "musk",
        "symbol": "MUSK",
        "hgnc": "HGNC:7525",
        "name": "muscle associated receptor tyrosine kinase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/musk"
      },
      {
        "slug": "myh3",
        "symbol": "MYH3",
        "hgnc": "HGNC:7573",
        "name": "myosin heavy chain 3",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/myh3"
      },
      {
        "slug": "myod1",
        "symbol": "MYOD1",
        "hgnc": "HGNC:7611",
        "name": "myogenic differentiation 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/myod1"
      },
      {
        "slug": "nup88",
        "symbol": "NUP88",
        "hgnc": "HGNC:8067",
        "name": "nucleoporin 88",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nup88"
      },
      {
        "slug": "rapsn",
        "symbol": "RAPSN",
        "hgnc": "HGNC:9863",
        "name": "receptor associated protein of the synapse",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rapsn"
      },
      {
        "slug": "slc18a3",
        "symbol": "SLC18A3",
        "hgnc": "HGNC:10936",
        "name": "solute carrier family 18 member A3",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/slc18a3"
      },
      {
        "slug": "tuba1a",
        "symbol": "TUBA1A",
        "hgnc": "HGNC:20766",
        "name": "tubulin alpha 1a",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tuba1a"
      },
      {
        "slug": "xpa",
        "symbol": "XPA",
        "hgnc": "HGNC:12814",
        "name": "XPA, DNA damage recognition and repair factor",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/xpa"
      },
      {
        "slug": "xpc",
        "symbol": "XPC",
        "hgnc": "HGNC:12816",
        "name": "XPC complex subunit, DNA damage recognition and repair factor",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/xpc"
      },
      {
        "slug": "ccn2",
        "symbol": "CCN2",
        "hgnc": "HGNC:2500",
        "name": "cellular communication network factor 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ccn2"
      },
      {
        "slug": "dkc1",
        "symbol": "DKC1",
        "hgnc": "HGNC:2890",
        "name": "dyskerin pseudouridine synthase 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dkc1"
      },
      {
        "slug": "nhp2",
        "symbol": "NHP2",
        "hgnc": "HGNC:14377",
        "name": "NHP2 ribonucleoprotein",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nhp2"
      },
      {
        "slug": "nop10",
        "symbol": "NOP10",
        "hgnc": "HGNC:14378",
        "name": "NOP10 ribonucleoprotein",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nop10"
      },
      {
        "slug": "phgdh",
        "symbol": "PHGDH",
        "hgnc": "HGNC:8923",
        "name": "phosphoglycerate dehydrogenase",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/phgdh"
      }
    ]
  }
}