{
  "url": "https://dantelabs.com/traits/concave-nail",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "concave-nail",
    "id": "HP:0001598",
    "name": "Spoon-shaped nails",
    "label": "Concave nail",
    "definition": "The natural longitudinal (posterodistal) convex arch is not present or is inverted.",
    "synonyms": [
      "Koilonychia"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-integument",
        "name": "Abnormality of the integument",
        "url": "https://dantelabs.com/traits/abnormality-of-the-integument"
      }
    ],
    "broader": [
      {
        "slug": "nail-dysplasia",
        "name": "Atypical nail growth",
        "url": "https://dantelabs.com/traits/nail-dysplasia"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "msx1",
        "symbol": "MSX1",
        "hgnc": "HGNC:7391",
        "name": "msh homeobox 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/msx1"
      },
      {
        "slug": "hras",
        "symbol": "HRAS",
        "hgnc": "HGNC:5173",
        "name": "HRas proto-oncogene, GTPase",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/hras"
      },
      {
        "slug": "rlim",
        "symbol": "RLIM",
        "hgnc": "HGNC:13429",
        "name": "ring finger protein, LIM domain interacting",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rlim"
      },
      {
        "slug": "aars1",
        "symbol": "AARS1",
        "hgnc": "HGNC:20",
        "name": "alanyl-tRNA synthetase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/aars1"
      },
      {
        "slug": "cars1",
        "symbol": "CARS1",
        "hgnc": "HGNC:1493",
        "name": "cysteinyl-tRNA synthetase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cars1"
      },
      {
        "slug": "dbr1",
        "symbol": "DBR1",
        "hgnc": "HGNC:15594",
        "name": "debranching RNA lariats 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dbr1"
      },
      {
        "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": "gtf2e2",
        "symbol": "GTF2E2",
        "hgnc": "HGNC:4651",
        "name": "general transcription factor IIE subunit 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gtf2e2"
      },
      {
        "slug": "gtf2h5",
        "symbol": "GTF2H5",
        "hgnc": "HGNC:21157",
        "name": "general transcription factor IIH subunit 5",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gtf2h5"
      },
      {
        "slug": "krt1",
        "symbol": "KRT1",
        "hgnc": "HGNC:6412",
        "name": "keratin 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/krt1"
      },
      {
        "slug": "mplkip",
        "symbol": "MPLKIP",
        "hgnc": "HGNC:16002",
        "name": "M-phase specific PLK1 interacting protein",
        "frequency": "occasional",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/mplkip"
      },
      {
        "slug": "rnf113a",
        "symbol": "RNF113A",
        "hgnc": "HGNC:12974",
        "name": "ring finger protein 113A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnf113a"
      },
      {
        "slug": "tars1",
        "symbol": "TARS1",
        "hgnc": "HGNC:11572",
        "name": "threonyl-tRNA synthetase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tars1"
      },
      {
        "slug": "tmprss6",
        "symbol": "TMPRSS6",
        "hgnc": "HGNC:16517",
        "name": "transmembrane serine protease 6",
        "frequency": "very-rare",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tmprss6"
      },
      {
        "slug": "eda",
        "symbol": "EDA",
        "hgnc": "HGNC:3157",
        "name": "ectodysplasin A",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/eda"
      },
      {
        "slug": "hoxc13",
        "symbol": "HOXC13",
        "hgnc": "HGNC:5125",
        "name": "homeobox C13",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hoxc13"
      },
      {
        "slug": "lmx1b",
        "symbol": "LMX1B",
        "hgnc": "HGNC:6654",
        "name": "LIM homeobox transcription factor 1 beta",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lmx1b"
      },
      {
        "slug": "plcd1",
        "symbol": "PLCD1",
        "hgnc": "HGNC:9060",
        "name": "phospholipase C delta 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/plcd1"
      },
      {
        "slug": "trps1",
        "symbol": "TRPS1",
        "hgnc": "HGNC:12340",
        "name": "transcriptional repressor GATA binding 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trps1"
      }
    ]
  }
}