Abstract:Purpose: High-dose radiotherapy (RT) is a standard treatment for locally advanced head and neck squamous cell carcinoma (HNSCC). Despite known molecular prognostic biomarkers in HNSCC, such as the presence of human papillomavirus (HPV) within tumor tissues, RT regimens remain one-size-fits-all without any patient-specific individualization. We hypothesize that rapid release of circulating tumor DNA (ctDNA) can act as a biomarker of treatment response in HNSCC by reflecting tumor cell death in response to RT.
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