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Table 6 Retrospective and prospective nodal staging

From: Specimen oriented intraoperative margin assessment in oral cavity and oropharyngeal squamous cell carcinoma

Nodal Stage Retrospective (n = 116) Prospective (n = 111)
N0 65 (56%) 40 (36%)
N1 12 (10%) 33 (30%)
N2   2 (2%)
 a 11 (9%) 6 (5%)
 b 22 (19%) 18 (16%)
 c 2 (2%) 3 (3%)
N3 3 (3%) 4 (4%)
Unknown 1 (1%) 5 (4%)