Abstract
We investigated the prognostic factor of N3 head and neck squamous cell carcinoma (HNSCC), including the role of upfront neck dissection (UFND) before radiotherapy (RT). We retrospectively reviewed the charts of consecutive N3 HNSCC patients treated with curative intent RT. In the study, 323 N3 HNSCC patients were included. Of those, 125 patients (39%) had UFND. Median follow-up was 3.9 years (0-14.8 years). Overall survival (OS) at 5 years was 31.2%, and progression-free survival (PFS) was 26%. In the multivariate analysis, OS was improved in PS 0, T1-2 tumors, patients receiving concurrent chemotherapy, never or former smokers, and UFND. UFND was strongly associated with increased OS (45.7% vs. 21.2%, P < .001), and PFS (P < .001). Regardless of neck node size, UFND improved survival (P = .001 for ≤ 7 cm and P = .004 for > 7 cm). UFND could improve treatment outcomes in N3 HNSCC, especially for non-oropharyngeal cancer, regardless of neck node size. 2B Laryngoscope, 131:E844-E850, 2021.
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