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Orphanet classification of rare developmental anomalies during embryogenesis

Rare developmental defect during embryogenesis ORPHA:93890
- Rare surgical cardiac disease ORPHA:97965
  - Rare congenital non-syndromic heart malformation ORPHA:88991
    - Rare atrial defect and interatrial communication ORPHA:98727
      - Interatrial communication ORPHA:1478
        
        Atrial septal defect, sinus venosus type ORPHA:99105

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