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 C04 Neoplasms D009369 +
  C04.588 Neoplasms by Site D009371 +
   C04.588.443 Head and Neck Neoplasms D006258 +
     C04.588.443.353 Esophageal Neoplasms D004938 
     C04.588.443.392 Facial Neoplasms D005153 +
     C04.588.443.591 Mouth Neoplasms D009062 +
     C04.588.443.665 Otorhinolaryngologic Neoplasms D010039 +
     C04.588.443.680 Parathyroid Neoplasms D010282 
     C04.588.443.915 Thyroid Neoplasms D013964 +
     C04.588.443.925 Tracheal Neoplasms D014134