{
  "url": "https://dantelabs.com/traits/mastocytosis",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "mastocytosis",
    "id": "HP:0100495",
    "name": "Mastocytosis",
    "definition": "The presence of an increased number of mast cells and CD34+ mast cell precursors in the body.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-blood-and-blood-forming-tissues",
        "name": "Abnormality of blood and blood-forming tissues",
        "url": "https://dantelabs.com/traits/abnormality-of-blood-and-blood-forming-tissues"
      },
      {
        "slug": "abnormality-of-the-immune-system",
        "name": "Abnormality of the immune system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-immune-system"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-mast-cell-morphology",
        "name": "Abnormal mast cell morphology",
        "url": "https://dantelabs.com/traits/abnormal-mast-cell-morphology"
      }
    ],
    "narrower": [
      {
        "slug": "cutaneous-mastocytosis",
        "name": "Cutaneous mastocytosis",
        "genes": 1,
        "url": "https://dantelabs.com/traits/cutaneous-mastocytosis"
      }
    ],
    "genes": []
  }
}