{
  "url": "https://dantelabs.com/traits/breast-mass",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "breast-mass",
    "id": "HP:0032408",
    "name": "Breast mass",
    "definition": "A breast lump is any discrete mass in a breast noticed by the patient, significant other, or physician.",
    "synonyms": [
      "Breast lump"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-breast",
        "name": "Abnormality of the breast",
        "url": "https://dantelabs.com/traits/abnormality-of-the-breast"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-breast-morphology",
        "name": "Abnormal breast morphology",
        "url": "https://dantelabs.com/traits/abnormal-breast-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "sptbn1",
        "symbol": "SPTBN1",
        "hgnc": "HGNC:11275",
        "name": "spectrin beta, non-erythrocytic 1",
        "frequency": "very-rare",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sptbn1"
      }
    ]
  }
}