Preservation of Swallowing in Respected Oral Cavity Squamous Cell Carcinoma: Examining Radiation Volume Effects (PRESERVE): A Randomized Trial

Inclusion Criteria:

• Willing to provide informed consent
• ECOG performance status 0-2
• Histologically confirmed, resected oral cavity squamous cell carcinoma with at leastipsilateral selective neck disection
• Patient has pathological features that are indications for PORT: positive or close (≤ 3 mm) margin, presence of LVI or PNU, pT3 or pT4 disease, positive lymph nodes, andPORT is recommended by treating physician
• Pathologically lympth node negative in at least one dissected hemi-neck with at least 10 nodes recovered in each pN0 hemi-neck

Exclusion Criteria:

• Serious medical comorbidities or other contraindications to radiotherapy
• Prior history of head and neck cancer within 5 years
• Any other active invasive malignancy, except non-melanotic skin cancers
• Prior head and neck radiation at any time
• Prior oncologic head and neck surgery in the oral cavity or neck
• Metastatic disease
• Locoregional disease recurrence identified following surgical resection but prior tothe start of radiotherapy
• Inability to attend full course of radio therapy or follow-up visits
• Unable or unwilling to complete QoL questionnaires
• Pregnant or lactating women