{
  "url": "https://dantelabs.com/traits/abnormal-umbilicus-morphology",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "abnormal-umbilicus-morphology",
    "id": "HP:0001551",
    "name": "Abnormal belly button",
    "label": "Abnormal umbilicus morphology",
    "definition": "An abnormality of the structure or appearance of the umbilicus.",
    "synonyms": [
      "Abnormal navel",
      "Abnormal umbilicus"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-digestive-system",
        "name": "Abnormality of the digestive system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-digestive-system"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-abdominal-wall-morphology",
        "name": "Abnormality of the abdominal wall",
        "url": "https://dantelabs.com/traits/abnormal-abdominal-wall-morphology"
      }
    ],
    "narrower": [
      {
        "slug": "umbilical-hernia",
        "name": "Umbilical hernia",
        "genes": 330,
        "url": "https://dantelabs.com/traits/umbilical-hernia"
      },
      {
        "slug": "prominent-umbilicus",
        "name": "Prominent belly button",
        "genes": 7,
        "url": "https://dantelabs.com/traits/prominent-umbilicus"
      },
      {
        "slug": "inferiorly-positioned-umbilicus",
        "name": "Inferiorly positioned umbilicus",
        "genes": 1,
        "url": "https://dantelabs.com/traits/inferiorly-positioned-umbilicus"
      },
      {
        "slug": "lozenge-shaped-umbilicus",
        "name": "Lozenge-shaped umbilicus",
        "genes": 1,
        "url": "https://dantelabs.com/traits/lozenge-shaped-umbilicus"
      },
      {
        "slug": "periumbilical-depression",
        "name": "Periumbilical depression",
        "genes": 1,
        "url": "https://dantelabs.com/traits/periumbilical-depression"
      }
    ],
    "genes": [
      {
        "slug": "krt1",
        "symbol": "KRT1",
        "hgnc": "HGNC:6412",
        "name": "keratin 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/krt1"
      },
      {
        "slug": "fras1",
        "symbol": "FRAS1",
        "hgnc": "HGNC:19185",
        "name": "Fraser extracellular matrix complex subunit 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fras1"
      }
    ]
  }
}