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Updated: Dec 8, 2025
Therapy Testing in a Spheroid-based 3D Cell Culture Model for Head and Neck Squamous Cell Carcinoma
Published on: April 20, 2018
Prognostic potential of mid-treatment nodal response in oropharyngeal squamous cell carcinoma
David J Byun1, Moses M Tam1, Adam S Jacobson2
1Department of Radiation Oncology, NYU Langone Health, New York, New York, USA.
Background:
We examine the prognostic implications of mid-course nodal response in oropharyngeal cancer (OPX) to radiation therapy.
Methods:
In 44 patients with node-positive OPX undergoing concurrent chemoradiation, nodal volumes were measured on cone beam CTs from days 1, 10, 20, and 35. Nodal decrease (ND) was based on percent shrinkage from day 1.
Results:
At a median follow-up of 17 months, the 2-year disease-free survival (DFS), locoregional control (LRC), distant metastasis-free survival (DMFS), and overall survival (OS) were 87%, 92%, 89%, and 92%, respectively. Patients with ND ≥43% at D20 had improved LRC (100% vs 78.4%, P = .03) compared to D20 ND <43%. On multivariate analysis, D20 ≥43% was independently prognostic for LRC (HR 1.17, P = .05).
Conclusion:
Patients with low-risk oropharynx cancer with ND of ≥43% by treatment day 20 had significantly improved LRC. The prognostic benefit of ND may assist in identifying candidates for treatment de-escalation.
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