{
  "url": "https://dantelabs.com/traits/short-hallux",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "short-hallux",
    "id": "HP:0010109",
    "name": "Short big toe",
    "label": "Short hallux",
    "definition": "Underdevelopment (hypoplasia) of the big toe.",
    "synonyms": [
      "Hypoplastic big toes",
      "Hypoplastic hallux",
      "Short halluces",
      "Small hallux"
    ],
    "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-hallux",
        "name": "Absent/small big toe",
        "url": "https://dantelabs.com/traits/aplasia-hypoplasia-of-the-hallux"
      },
      {
        "slug": "short-toe",
        "name": "Short toe",
        "url": "https://dantelabs.com/traits/short-toe"
      }
    ],
    "narrower": [
      {
        "slug": "short-phalanx-of-hallux",
        "name": "Hypoplastic phalanges of the hallux",
        "genes": 0,
        "url": "https://dantelabs.com/traits/short-phalanx-of-hallux"
      }
    ],
    "genes": [
      {
        "slug": "eif4a3",
        "symbol": "EIF4A3",
        "hgnc": "HGNC:18683",
        "name": "eukaryotic translation initiation factor 4A3",
        "frequency": "obligate",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/eif4a3"
      },
      {
        "slug": "hoxa13",
        "symbol": "HOXA13",
        "hgnc": "HGNC:5102",
        "name": "homeobox A13",
        "frequency": "obligate",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/hoxa13"
      },
      {
        "slug": "sf3b4",
        "symbol": "SF3B4",
        "hgnc": "HGNC:10771",
        "name": "splicing factor 3b subunit 4",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sf3b4"
      },
      {
        "slug": "slc13a1",
        "symbol": "SLC13A1",
        "hgnc": "HGNC:10916",
        "name": "solute carrier family 13 member 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/slc13a1"
      },
      {
        "slug": "top2b",
        "symbol": "TOP2B",
        "hgnc": "HGNC:11990",
        "name": "DNA topoisomerase II beta",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/top2b"
      },
      {
        "slug": "acvr1",
        "symbol": "ACVR1",
        "hgnc": "HGNC:171",
        "name": "activin A receptor type 1",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/acvr1"
      },
      {
        "slug": "bhlha9",
        "symbol": "BHLHA9",
        "hgnc": "HGNC:35126",
        "name": "basic helix-loop-helix family member a9",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bhlha9"
      },
      {
        "slug": "bmpr1b",
        "symbol": "BMPR1B",
        "hgnc": "HGNC:1077",
        "name": "bone morphogenetic protein receptor type 1B",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/bmpr1b"
      },
      {
        "slug": "fgfr1",
        "symbol": "FGFR1",
        "hgnc": "HGNC:3688",
        "name": "fibroblast growth factor receptor 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fgfr1"
      },
      {
        "slug": "fgfr2",
        "symbol": "FGFR2",
        "hgnc": "HGNC:3689",
        "name": "fibroblast growth factor receptor 2",
        "frequency": "very-frequent",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/fgfr2"
      },
      {
        "slug": "flna",
        "symbol": "FLNA",
        "hgnc": "HGNC:3754",
        "name": "filamin A",
        "frequency": "very-frequent",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/flna"
      },
      {
        "slug": "gdf5",
        "symbol": "GDF5",
        "hgnc": "HGNC:4220",
        "name": "growth differentiation factor 5",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/gdf5"
      },
      {
        "slug": "gpc4",
        "symbol": "GPC4",
        "hgnc": "HGNC:4452",
        "name": "glypican 4",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gpc4"
      },
      {
        "slug": "ihh",
        "symbol": "IHH",
        "hgnc": "HGNC:5956",
        "name": "Indian hedgehog signaling molecule",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ihh"
      },
      {
        "slug": "abcc9",
        "symbol": "ABCC9",
        "hgnc": "HGNC:60",
        "name": "ATP binding cassette subfamily C member 9",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/abcc9"
      },
      {
        "slug": "chst11",
        "symbol": "CHST11",
        "hgnc": "HGNC:17422",
        "name": "carbohydrate sulfotransferase 11",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/chst11"
      },
      {
        "slug": "cplx1",
        "symbol": "CPLX1",
        "hgnc": "HGNC:2309",
        "name": "complexin 1",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/cplx1"
      },
      {
        "slug": "ctbp1",
        "symbol": "CTBP1",
        "hgnc": "HGNC:2494",
        "name": "C-terminal binding protein 1",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/ctbp1"
      },
      {
        "slug": "kat6a",
        "symbol": "KAT6A",
        "hgnc": "HGNC:13013",
        "name": "lysine acetyltransferase 6A",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kat6a"
      },
      {
        "slug": "kcnj8",
        "symbol": "KCNJ8",
        "hgnc": "HGNC:6269",
        "name": "potassium inwardly rectifying channel subfamily J member 8",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kcnj8"
      },
      {
        "slug": "letm1",
        "symbol": "LETM1",
        "hgnc": "HGNC:6556",
        "name": "leucine zipper and EF-hand containing transmembrane protein 1",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/letm1"
      },
      {
        "slug": "nelfa",
        "symbol": "NELFA",
        "hgnc": "HGNC:12768",
        "name": "negative elongation factor complex member A",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nelfa"
      },
      {
        "slug": "nsd2",
        "symbol": "NSD2",
        "hgnc": "HGNC:12766",
        "name": "nuclear receptor binding SET domain protein 2",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/nsd2"
      },
      {
        "slug": "pigg",
        "symbol": "PIGG",
        "hgnc": "HGNC:25985",
        "name": "phosphatidylinositol glycan anchor biosynthesis class G (EMM blood group)",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/pigg"
      },
      {
        "slug": "robo1",
        "symbol": "ROBO1",
        "hgnc": "HGNC:10249",
        "name": "roundabout guidance receptor 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/robo1"
      },
      {
        "slug": "sall4",
        "symbol": "SALL4",
        "hgnc": "HGNC:15924",
        "name": "spalt like transcription factor 4",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sall4"
      },
      {
        "slug": "tpr",
        "symbol": "TPR",
        "hgnc": "HGNC:12017",
        "name": "translocated promoter region, nuclear basket protein",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tpr"
      },
      {
        "slug": "chsy1",
        "symbol": "CHSY1",
        "hgnc": "HGNC:17198",
        "name": "chondroitin sulfate synthase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/chsy1"
      },
      {
        "slug": "fgfrl1",
        "symbol": "FGFRL1",
        "hgnc": "HGNC:3693",
        "name": "fibroblast growth factor receptor like 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fgfrl1"
      },
      {
        "slug": "gja1",
        "symbol": "GJA1",
        "hgnc": "HGNC:4274",
        "name": "gap junction protein alpha 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gja1"
      },
      {
        "slug": "puf60",
        "symbol": "PUF60",
        "hgnc": "HGNC:17042",
        "name": "poly(U) binding splicing factor 60",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/puf60"
      },
      {
        "slug": "bmp2",
        "symbol": "BMP2",
        "hgnc": "HGNC:1069",
        "name": "bone morphogenetic protein 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/bmp2"
      },
      {
        "slug": "mgp",
        "symbol": "MGP",
        "hgnc": "HGNC:7060",
        "name": "matrix Gla protein",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mgp"
      },
      {
        "slug": "nog",
        "symbol": "NOG",
        "hgnc": "HGNC:7866",
        "name": "noggin",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nog"
      }
    ]
  }
}