{
  "description": "Codesystem für Her2neu Status basierend auf der S3-Leitlinie Mammakarzinom und ASCO/CAP Guidelines mit erweiterten Klassifikationen (HER2-low, HER2-ultralow)",
  "_filename": "CodeSystem-mii-cs-onko-mamma-her2neu-status-leitlinie.json",
  "package_name": "de.medizininformatikinitiative.kerndatensatz.onkologie",
  "date": "2026-09-15T06:26:59+00:00",
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  } ],
  "content": "complete",
  "name": "MII_CS_Onko_Mamma_Her2neu_Status_Leitlinie",
  "type": null,
  "experimental": "false",
  "resourceType": "CodeSystem",
  "title": "MII CS Onkologie Mamma Her2neu Status Leitlinie",
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  "concept": [ {
    "code": "positiv",
    "display": "HER2-positiv",
    "definition": "HER2-positiv: IHC 3+ (Score 3+) oder IHC 2+ (Score 2+) und ISH positiv"
  }, {
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    "display": "HER2-low",
    "definition": "HER2-low: IHC 1+ oder IHC 2+ und ISH negativ"
  }, {
    "code": "ultralow",
    "display": "HER2-ultralow",
    "definition": "HER2-ultralow: IHC 0 mit Membranfärbung"
  }, {
    "code": "negativ",
    "display": "HER2-negativ",
    "definition": "HER2-negativ: IHC 0 ohne Membranfärbung"
  }, {
    "code": "equivocal",
    "display": "equivocal",
    "definition": "Equivocal: Grenzwertig/unklarer Befund, weitere Testung erforderlich"
  } ],
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