Head & Neck Cancer Staging

Oral Cavity

T-Stage

Oral Cavity Staging

N-Stage

• NX: nodes cannot be assessed
• N0: no regional node metastases
• N1: metastasis in single ipsilateral node, ≤3 cm, and no extranodal extension (ENE(−))
• N2
  • N2a: metastasis in single ipsilateral node, >3 cm and ≤6 cm, and ENE(−)
  • N2b: metastasis in multiple ipsilateral nodes, all ≤6 cm, and ENE(−)
  • N2c: metastasis in bilateral or contralateral nodes, all ≤6 cm, and ENE(−)
• N3
  • N3a: metastasis in a node, >6 cm, and ENE(−)
  • N3b: metastasis in a node with clinically overt ENE(+) (ENEc)