Clinical nodal stage is a significant predictor of outcome in patients with oral cavity squamous cell carcinoma and pathologically negative neck metastases: Results of the international consortium for outcome research

  • M. Amit
  • , T. C. Yen
  • , C. T. Liao
  • , Y. Binenbaum
  • , P. Chaturvedi
  • , J. P. Agarwal
  • , L. P. Kowalski
  • , A. Ebrahimi
  • , J. R. Clark
  • , C. R. Cernea
  • , S. J. Brandao
  • , M. Kreppel
  • , J. Zöller
  • , D. Fliss
  • , G. Bachar
  • , T. Shpitzer
  • , V. A. Bolzoni
  • , P. R. Patel
  • , S. Jonnalagadda
  • , K. T. Robbins
  • J. P. Shah, S. G. Patel, Ziv Gil

Research output: Contribution to journalJournal Article peer-review

45 Scopus citations

Abstract

Background: We aimed to study the importance of clinical N classification (cN) in a subgroup of patients with oral cavity squamous cell carcinoma (OSCC) and pathologically negative neck nodes (pN-). Methods: A total of 2,258 patients from 11 cancer centers who underwent neck dissection for OSCC (1990-2011) had pN- disease. The median follow-up was 44 months. 5-year overall survival (OS), disease-specific survival (DSS), disease free survival, local control, locoregional control, and distant metastasis rates were calculated by the Kaplan-Meier method. cN classification and tumor, node, metastasis classification system staging variables were subjected to multivariate analysis. Results: A total of 345 patients were preoperatively classified as cN+ and 1,913 were classified as cN-. The 5-year OS and DSS of cN- patients were 73.6 and 82.2 %, respectively. The 5-year OS and DSS of cN+ patients were 64.9 and 76.9 %, respectively (p < 0.0001 each). A cN+ classification was a significant predictor of worse OS (p = 0.03) and DSS (p = 0.016), regardless of treatment, depth of invasion, or extent of neck dissection. cN classification was associated with recurrence-free survival (p = 0.01) and locoregional (neck and primary tumor) control (p = 0.004), but not with local (p = 0.19) and distant (p = 0.06) recurrence rates. Conclusions: Clinical evidence of neck metastases is an independent predictor of outcome, even in patients with pN- nodes.

Original languageEnglish
Pages (from-to)3575-3581
Number of pages7
JournalAnnals of Surgical Oncology
Volume20
Issue number11
DOIs
StatePublished - 10 2013
Externally publishedYes

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