{
  "url": "https://dantelabs.com/traits/nevus-sebaceous",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "nevus-sebaceous",
    "id": "HP:0010815",
    "name": "Nevus sebaceous",
    "definition": "A congenital, hairless plaque consisting of overgrown epidermis, sebaceous glands, hair follicles, apocrine glands and connective tissue. They are a variant of epidermal naevi. Sebaceous naevi most often appear on the scalp, but they may also arise on the face, neck or forehead. At birth, a sevaceous nevus typically appears as a solitary, smooth, yellow-orange hairless patch. Sebaceous naevi become more pronounced around adolescence, often appearing bumpy, warty or scaly.",
    "synonyms": [
      "Naevus sebaceous",
      "Organoid nevus",
      "Sebaceous mole",
      "Sebaceous naevus",
      "Sebaceous nevus"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-integument",
        "name": "Abnormality of the integument",
        "url": "https://dantelabs.com/traits/abnormality-of-the-integument"
      }
    ],
    "broader": [
      {
        "slug": "epidermal-nevus",
        "name": "Epidermal nevus",
        "url": "https://dantelabs.com/traits/epidermal-nevus"
      }
    ],
    "narrower": [
      {
        "slug": "linear-nevus-sebaceous",
        "name": "Linear nevus sebaceous",
        "genes": 3,
        "url": "https://dantelabs.com/traits/linear-nevus-sebaceous"
      }
    ],
    "genes": [
      {
        "slug": "braf",
        "symbol": "BRAF",
        "hgnc": "HGNC:1097",
        "name": "B-Raf proto-oncogene, serine/threonine kinase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/braf"
      },
      {
        "slug": "smo",
        "symbol": "SMO",
        "hgnc": "HGNC:11119",
        "name": "smoothened, frizzled class receptor",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/smo"
      },
      {
        "slug": "hras",
        "symbol": "HRAS",
        "hgnc": "HGNC:5173",
        "name": "HRas proto-oncogene, GTPase",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hras"
      },
      {
        "slug": "kras",
        "symbol": "KRAS",
        "hgnc": "HGNC:6407",
        "name": "KRas proto-oncogene, GTPase",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kras"
      },
      {
        "slug": "nras",
        "symbol": "NRAS",
        "hgnc": "HGNC:7989",
        "name": "NRAS proto-oncogene, GTPase",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/nras"
      }
    ]
  }
}