{
  "url": "https://dantelabs.com/traits/air-bronchogram",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "air-bronchogram",
    "id": "HP:0033662",
    "name": "Air bronchogram",
    "definition": "An air bronchogram is a pattern of air-filled (low-attenuation) bronchi on a background of opaque (high-attenuation) airless lung. The sign implies (a) patency of proximal airways and (b) evacuation of alveolar air by means of absorption (atelectasis) or replacement (eg, pneumonia) or a combination of these processes. In rare cases, the displacement of air is the result of marked interstitial expansion (eg, lymphoma).",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-respiratory-system",
        "name": "Abnormality of the respiratory system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-respiratory-system"
      }
    ],
    "broader": [
      {
        "slug": "abnormal-pulmonary-thoracic-imaging-finding",
        "name": "Abnormal pulmonary thoracic imaging finding",
        "url": "https://dantelabs.com/traits/abnormal-pulmonary-thoracic-imaging-finding"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "cybb",
        "symbol": "CYBB",
        "hgnc": "HGNC:2578",
        "name": "cytochrome b-245 beta chain",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cybb"
      }
    ]
  }
}