{
  "url": "https://dantelabs.com/traits/caudal-appendage",
  "trait": {
    "bundleId": "2026.10.16-c6eea6bf",
    "release": "2026-09-01",
    "slug": "caudal-appendage",
    "id": "HP:0002825",
    "name": "Human tail",
    "label": "Caudal appendage",
    "definition": "The presence of a tail-like skin appendage located adjacent to the sacrum.",
    "synonyms": [
      "Coccygeal tail",
      "Sacral appendage"
    ],
    "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-coccyx-morphology",
        "name": "Abnormal tailbone",
        "url": "https://dantelabs.com/traits/abnormal-coccyx-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "masp1",
        "symbol": "MASP1",
        "hgnc": "HGNC:6901",
        "name": "MBL associated serine protease 1",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/masp1"
      },
      {
        "slug": "trpv4",
        "symbol": "TRPV4",
        "hgnc": "HGNC:18083",
        "name": "transient receptor potential cation channel subfamily V member 4",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trpv4"
      },
      {
        "slug": "colec10",
        "symbol": "COLEC10",
        "hgnc": "HGNC:2220",
        "name": "collectin subfamily member 10",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/colec10"
      },
      {
        "slug": "colec11",
        "symbol": "COLEC11",
        "hgnc": "HGNC:17213",
        "name": "collectin subfamily member 11",
        "frequency": "occasional",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/colec11"
      },
      {
        "slug": "dchs1",
        "symbol": "DCHS1",
        "hgnc": "HGNC:13681",
        "name": "dachsous cadherin-related 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dchs1"
      },
      {
        "slug": "fat4",
        "symbol": "FAT4",
        "hgnc": "HGNC:23109",
        "name": "FAT atypical cadherin 4",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fat4"
      }
    ]
  }
}