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Table 3 Nodal metastasis by tumour stage.

From: Patterns of cervical metastasis from carcinoma of the oral tongue

  pN0 pN1 pN2a pN2b pN2c pN3 % of positive nodes
T1 9 4 1 2 1 0 47.05
T2 22 2 0 4 0 1 24.13
T3 4 2 2 3 0 0 63.6
T4 7 4 0 7 0 0 61.1