Onco Wiki / drapeau rouge

HER2 amplification / surexpression dans le cancer du sein (IHC 3+ OU IHC 2+ avec ISH amplificated...

Vue déterministe de l'entité source de la LJAM. L'autorité clinique demeure avec les ID de la source cités et l'état d'approbation de l ́examinateur.

IDRF-BREAST-HER2-AMP-ACTIONABLE
TypeSignal d’alerte
Étatreviewed 2026-04-27 | pending_clinical_signoff
MaladiesDIS-BREAST
SourcesSRC-DESTINY-BREAST03-CORTES-2022 SRC-ESMO-BREAST-METASTATIC-2024 SRC-HER2CLIMB-MURTHY-2019 SRC-NCCN-BREAST-2025

Origine du drapeau rouge

DéfinitionHER2 amplification / overexpression in breast cancer (IHC 3+ OR IHC 2+ with ISH amplified) — ~15-20% of invasive breast. Defines HER2-positive treatment track: trastuzumab + pertuzumab + chemo (CLEOPATRA 1L), T-DXd 2L (DESTINY-Breast03 — mPFS 28.8 vs 6.8 mo vs T-DM1).
Direction cliniqueintensifier
Catégoriehigh-risk-biology
Algorithme de décalageALGO-BREAST-1L, ALGO-BREAST-HER2-POS-2L

Logique de déclenchement

{
  "any_of": [
    {
      "finding": "her2_status",
      "value": "positive"
    },
    {
      "finding": "her2_status",
      "value": "amplified"
    },
    {
      "finding": "her2_ihc",
      "value": "3+"
    },
    {
      "finding": "her2_ish",
      "value": "amplified"
    }
  ],
  "type": "biomarker"
}

Notes

Scoring: 2018 ASCO/CAP guideline. IHC 2+ → reflex ISH; HER2/CEP17 ≥2.0 OR average HER2 signals ≥6 = amplified. Brain metastases — tucatinib + trastuzumab + capecitabine (HER2CLIMB) preferred. T-DXd ILD risk ~10-15% — baseline + serial chest CT. Cardiomyopathy on trastuzumab — q3-monthly LVEF (early-stage) or q6-monthly (metastatic on extended therapy).

Utilisé par

Algorithmes

Chapitres du manuel

Questions du manuel

Signal d’alerte