{
  "url": "https://dantelabs.com/traits/abnormal-b-cell-proliferation",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "abnormal-b-cell-proliferation",
    "id": "HP:0031380",
    "name": "Abnormal B cell proliferation",
    "definition": "Any abnormality in the multiplication or reproduction of B cells, which results in the expansion of a cell population.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormal-cellular-phenotype",
        "name": "Abnormal cellular phenotype",
        "url": "https://dantelabs.com/traits/abnormal-cellular-phenotype"
      },
      {
        "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-metabolism-homeostasis",
        "name": "Laboratory abnormality",
        "url": "https://dantelabs.com/traits/abnormality-of-metabolism-homeostasis"
      },
      {
        "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-lymphocyte-proliferation",
        "name": "Abnormal lymphocyte proliferation",
        "url": "https://dantelabs.com/traits/abnormal-lymphocyte-proliferation"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "rel",
        "symbol": "REL",
        "hgnc": "HGNC:9954",
        "name": "REL proto-oncogene, NF-kB subunit",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rel"
      }
    ]
  }
}