N Staging in Nasopharyngeal Carcinoma (NPC)

  • NX – Regional lymph nodes cannot be assessed
  • N0 – No regional lymph node metastasis
  • N1 – Unilateral metastasis in cervical lymph node(s) and/ or unilateral or bilateral metastasis in retropharyngeal lymph node(s), 6 cm or smaller in greatest dimension, above the caudal border of cricoid cartilage
  • N2 – Bilateral metastasis in cervical lymph node(s), 6 cm or smaller in greatest dimension, above the caudal border of cricoid cartilage
  • N3 – Unilateral or bilateral metastasis in cervical lymph node(s), larger than 6 cm in greatest dimensión, and/ or extension below the caudal border of cricoid cartilage

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