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. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Radiother Oncol. 2015 Jun 17;116(1):75–81. doi: 10.1016/j.radonc.2015.06.006

Figure 1.

Figure 1

Figure 1

Kaplan-Meier curves of patterns of failure of patients with and without RPA. P values are calculated using log-rank test. A: Freedom from local failure with local failure as first failure. B: Freedom from regional failure with regional failure as first failure. C: Freedom from locoregional failure D: Freedom from distant failure with distant failure as first failure.

RPA=Retropharyngeal adenopathy; LRF=locoregional failure