PRIMARY OBJECTIVE:
I. To determine the risk of solitary elective volume recurrence following INRT versus ENI.
SECONDARY OBJECTIVES:
I. To compare the incidence of acute grade 2+ acute dermatitis in patients treated with INRT versus ENI.
II. To compare the incidence of grade 3+ dysphagia in patients treated with INRT versus ENI.
III. To compare the MD Anderson Dysphagia Inventory (MDADI) composite score at 2 years following treatment in patients treated with INRT versus ENI.
EXPLORATORY OBJECTIVES:
I. To determine the rate of grade 3-5 acute (start of treatment through 90 days from the completion of treatment) and late (after 90 days from the completion of treatment) adverse events, according to National Cancer Institute's (NCI’s) Common Terminology Criteria for Adverse Events (CTCAE) version (v)5.0 toxicity criteria in patients treated with INRT versus ENI.
II. To compare the overall survival probability at 2 years from the start of treatment in patients treated with INRT versus ENI.
III. To compare the progression-free survival probability at 2 years from the start of treatment in patients treated with INRT versus ENI.
IV. To compare the cumulative incidence of locoregional recurrence at 2 years, with death as a competing risk in patients treated with INRT versus ENI.
V. To compare the University of Washington Quality-of-Life (UWQOL) Scores score at 2 years following treatment in patients treated with INRT versus ENI.
VI. To compare the Xerostomia Questionnaire (XQ) score at 2 years following treatment in patients treated with INRT versus ENI.
VII. To compare the diffusion weighted imaging (DWI) and dynamic contrast-enhanced (DCE) characteristics at baseline and at 3 weeks in patients with and without locoregional recurrence and/or distant metastasis (for those patients on the optional magnetic resonance imaging [MRI] study).
OUTLINE: Patients are randomized to 1 of 2 arms.
ARM A:
* STAGE I DISEASE: Patients receive standard-of-care (SOC) elective nodal irradiation (ENI) once daily (QD), Monday through Friday, over 35 treatment sessions in the absence of disease progression or unacceptable toxicity.
* STAGE II DISEASE: Patients receive either: 1) SOC ENI QD, Monday through Friday, over 35 treatment sessions OR 2) accelerated ENI QD, 6 days per week, over 35 treatment sessions in absence of disease progression or unacceptable toxicity.
* STAGE III DISEASE: Patients receive either: 1) SOC ENI QD, Monday through Friday, over 35 treatment sessions AND chemotherapy consisting of one of the following per treating physician discretion: a) cisplatin intravenously (IV) every 3 weeks (Q3W), b) cisplatin IV over 5 hours weekly (QW), c) cetuximab IV over 3 hours QW, d) carboplatin IV over 3 hours and paclitaxel IV over 3 hours QW in absence of disease progression or unacceptable toxicity, OR 2) accelerated ENI QD, 6 days per week, over 35 treatment sessions in absence of disease progression or unacceptable toxicity.
STAGE IVA-IVB DISEASE: Patients receive SOC ENI QD, Monday through Friday, over 35 treatment sessions AND chemotherapy consisting of one of the following per treating physician discretion: a) cisplatin intravenously (IV) every 3 weeks (Q3W), b) cisplatin IV over 5 hours weekly (QW), c) cetuximab IV over 3 hours QW, d) carboplatin IV over 3 hours and paclitaxel IV over 3 hours QW in absence of disease progression or unacceptable toxicity.
ARM B: Patients receive INRT QD, Monday through Friday, over 35 treatment sessions in the absence of disease progression or unacceptable toxicity.
All patients also undergo computed tomography (CT) of the neck during screening, CT or magnetic resonance imaging (MRI) of the neck during follow-up, and positron emission tomography (PET)-CT throughout the trial. Patients may also undergo optional multi-parametric MRI on study.
After completion of study treatment, patients are followed up at 1 month, at 11-14 weeks, then at 6, 12, and 24 months.