{
  "url": "https://dantelabs.com/traits/mirror-image-polydactyly",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "mirror-image-polydactyly",
    "id": "HP:0010689",
    "name": "Mirror image polydactyly",
    "definition": "A hand or foot with more than five digits that has a recognizable A/P axis of symmetry. The axis can lie within a normally formed or partially duplicated digit resembling a middle finger, index finger, thumb, toe, or hallux. Alternatively, the axis can be in an interdigital space with a flanking pair of digits that resemble a middle finger, index finger, thumb, toe or hallux. The most lateral digits on each side of the hand/foot typically resemble fifth fingers/toes.",
    "synonyms": [
      "Mirror image duplication of digits"
    ],
    "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": "polydactyly",
        "name": "More than five fingers or toes on hands or feet",
        "url": "https://dantelabs.com/traits/polydactyly"
      }
    ],
    "narrower": [
      {
        "slug": "mirror-image-foot-polydactyly",
        "name": "Mirror image duplication of toes",
        "genes": 1,
        "url": "https://dantelabs.com/traits/mirror-image-foot-polydactyly"
      }
    ],
    "genes": [
      {
        "slug": "lmbr1",
        "symbol": "LMBR1",
        "hgnc": "HGNC:13243",
        "name": "limb development membrane protein 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lmbr1"
      }
    ]
  }
}