{
  "url": "https://dantelabs.com/traits/short-2nd-finger",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "short-2nd-finger",
    "id": "HP:0009536",
    "name": "Short index finger",
    "label": "Short 2nd finger",
    "definition": "Hypoplasia of the second finger, also known as the index finger.",
    "synonyms": [
      "Short index fingers",
      "Hypoplastic index finger phalanges",
      "Hypoplastic/small index finger",
      "Short index finger phalanges"
    ],
    "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": "aplasia-hypoplasia-of-the-2nd-finger",
        "name": "Absent/small index finger",
        "url": "https://dantelabs.com/traits/aplasia-hypoplasia-of-the-2nd-finger"
      },
      {
        "slug": "short-finger",
        "name": "Short finger",
        "url": "https://dantelabs.com/traits/short-finger"
      }
    ],
    "narrower": [
      {
        "slug": "short-middle-phalanx-of-the-2nd-finger",
        "name": "Short middle bone of index finger",
        "genes": 9,
        "url": "https://dantelabs.com/traits/short-middle-phalanx-of-the-2nd-finger"
      },
      {
        "slug": "short-distal-phalanx-of-the-2nd-finger",
        "name": "Short outermost bone of the index finger",
        "genes": 3,
        "url": "https://dantelabs.com/traits/short-distal-phalanx-of-the-2nd-finger"
      },
      {
        "slug": "short-proximal-phalanx-of-the-2nd-finger",
        "name": "Short proximal phalanx of the 2nd finger",
        "genes": 1,
        "url": "https://dantelabs.com/traits/short-proximal-phalanx-of-the-2nd-finger"
      }
    ],
    "genes": [
      {
        "slug": "erf",
        "symbol": "ERF",
        "hgnc": "HGNC:3444",
        "name": "ETS2 repressor factor",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/erf"
      },
      {
        "slug": "fig4",
        "symbol": "FIG4",
        "hgnc": "HGNC:16873",
        "name": "FIG4 phosphoinositide 5-phosphatase",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fig4"
      },
      {
        "slug": "gdf5",
        "symbol": "GDF5",
        "hgnc": "HGNC:4220",
        "name": "growth differentiation factor 5",
        "frequency": "very-frequent",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/gdf5"
      },
      {
        "slug": "gpc3",
        "symbol": "GPC3",
        "hgnc": "HGNC:4451",
        "name": "glypican 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gpc3"
      },
      {
        "slug": "gpc4",
        "symbol": "GPC4",
        "hgnc": "HGNC:4452",
        "name": "glypican 4",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gpc4"
      },
      {
        "slug": "bmp2",
        "symbol": "BMP2",
        "hgnc": "HGNC:1069",
        "name": "bone morphogenetic protein 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bmp2"
      },
      {
        "slug": "bmpr1b",
        "symbol": "BMPR1B",
        "hgnc": "HGNC:1077",
        "name": "bone morphogenetic protein receptor type 1B",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bmpr1b"
      },
      {
        "slug": "irx5",
        "symbol": "IRX5",
        "hgnc": "HGNC:14361",
        "name": "iroquois homeobox 5",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/irx5"
      },
      {
        "slug": "meis2",
        "symbol": "MEIS2",
        "hgnc": "HGNC:7001",
        "name": "Meis homeobox 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/meis2"
      }
    ]
  }
}