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AJCC Staging of oral tumors

Primary
Tis carcinoma in situ
T1 tumor < 2 cm T2 tumor 2 to 4 cm T3 tumor > 4 cm
T4 tumor invades adjacent organs

Neck
N0 - No clinically palpable lymph node
N1 - single Ipsilateral lymph node < 3 cm N2a - single ipsilateral node >3cm to 6 cm
N2b - multiple ipsilateral lymph nodes < 6 cm N2c - bilateral or contralateral lymph nodes < 6 cm N3 Nodes > 6 cm

Distant metastasis
Mx Distant metastasis cannot be assessed
M0 No distant metastasis
M1 Distant metastasis

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